src/video/wincommon/SDL_sysevents.c - third_party/sdl - Git at Google

 /*
     SDL - Simple DirectMedia Layer
     Copyright (C) 1997-2009 Sam Lantinga

     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.

     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.

     You should have received a copy of the GNU Lesser General Public
     License along with this library; if not, write to the Free Software
     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

     Sam Lantinga
     slouken@libsdl.org
 */
 #include "SDL_config.h"

 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>

 /* Make sure XBUTTON stuff is defined that isn't in older Platform SDKs... */
 #ifndef WM_XBUTTONDOWN
 #define WM_XBUTTONDOWN 0x020B
 #endif
 #ifndef WM_XBUTTONUP
 #define WM_XBUTTONUP 0x020C
 #endif
 #ifndef GET_XBUTTON_WPARAM
 #define GET_XBUTTON_WPARAM(w) (HIWORD(w))
 #endif

 #include "SDL_events.h"
 #include "SDL_video.h"
 #include "SDL_syswm.h"
 #include "../SDL_sysvideo.h"
 #include "../../events/SDL_sysevents.h"
 #include "../../events/SDL_events_c.h"
 #include "SDL_lowvideo.h"
 #include "SDL_syswm_c.h"
 #include "SDL_main.h"
 #include "SDL_loadso.h"

 #ifdef WMMSG_DEBUG
 #include "wmmsg.h"
 #endif

 #include "../windib/SDL_gapidibvideo.h"

 #ifdef SDL_VIDEO_DRIVER_GAPI
 #include "../gapi/SDL_gapivideo.h"
 #endif

 #ifdef _WIN32_WCE
 #define IsZoomed(HWND) 1
 #define NO_GETKEYBOARDSTATE
 #if _WIN32_WCE < 420
 #define NO_CHANGEDISPLAYSETTINGS
 #endif
 #endif

 /* The window we use for everything... */
 #ifdef _WIN32_WCE
 LPWSTR SDL_Appname = NULL;
 #else
 LPSTR SDL_Appname = NULL;
 #endif
 Uint32 SDL_Appstyle = 0;
 HINSTANCE SDL_Instance = NULL;
 HWND SDL_Window = NULL;
 RECT SDL_bounds = {0, 0, 0, 0};
 int SDL_windowX = 0;
 int SDL_windowY = 0;
 int SDL_resizing = 0;
 int mouse_relative = 0;
 int posted = 0;
 #ifndef NO_CHANGEDISPLAYSETTINGS
 DEVMODE SDL_desktop_mode;
 DEVMODE SDL_fullscreen_mode;
 #endif
 WORD *gamma_saved = NULL;


 /* Functions called by the message processing function */
 LONG (*HandleMessage)(_THIS, HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)=NULL;
 void (*WIN_Activate)(_THIS, BOOL active, BOOL iconic);
 void (*WIN_RealizePalette)(_THIS);
 void (*WIN_PaletteChanged)(_THIS, HWND window);
 void (*WIN_WinPAINT)(_THIS, HDC hdc);
 extern void DIB_SwapGamma(_THIS);

 #ifndef NO_GETKEYBOARDSTATE
 /* Variables and support functions for SDL_ToUnicode() */
 static int codepage;
 static int Is9xME();
 static int GetCodePage();
 static int WINAPI ToUnicode9xME(UINT vkey, UINT scancode, BYTE *keystate, LPWSTR wchars, int wsize, UINT flags);

 ToUnicodeFN SDL_ToUnicode = ToUnicode9xME;
 #endif /* !NO_GETKEYBOARDSTATE */


 #if defined(_WIN32_WCE)

 //AdjustWindowRect is not available under WinCE 2003
 #define AdjustWindowRect(a,b,c) (AdjustWindowRectEx((a),(b),(c),0))

 // dynamically load aygshell dll because we want SDL to work on HPC and be300
 HINSTANCE aygshell = NULL;
 BOOL (WINAPI *SHFullScreen)(HWND hwndRequester, DWORD dwState) = 0;

 #define SHFS_SHOWTASKBAR            0x0001
 #define SHFS_HIDETASKBAR            0x0002
 #define SHFS_SHOWSIPBUTTON          0x0004
 #define SHFS_HIDESIPBUTTON          0x0008
 #define SHFS_SHOWSTARTICON          0x0010
 #define SHFS_HIDESTARTICON          0x0020

 static void LoadAygshell(void)
 {
 	if( !aygshell )
 		 aygshell = SDL_LoadObject("aygshell.dll");
 	if( (aygshell != 0) && (SHFullScreen == 0) )
 	{
 		SHFullScreen = (int (WINAPI *)(struct HWND__ *,unsigned long)) SDL_LoadFunction(aygshell, "SHFullScreen");
 	}
 }

 #endif

 /* JC 14 Mar 2006
    This is used all over the place, in the windib driver and in the dx5 driver
    So we may as well stick it here instead of having multiple copies scattered
    about
 */
 void WIN_FlushMessageQueue()
 {
 	MSG  msg;
 	while ( PeekMessage(&msg, NULL, 0, 0, PM_REMOVE) ) {
 		if ( msg.message == WM_QUIT ) break;
 		TranslateMessage( &msg );
 		DispatchMessage( &msg );
 	}
 }

 static void SDL_RestoreGameMode(void)
 {
 #ifdef _WIN32_WCE //Under ce we don't minimize, therefore no restore

 #ifdef SDL_VIDEO_DRIVER_GAPI
 	SDL_VideoDevice *this = current_video;
 	if(SDL_strcmp(this->name, "gapi") == 0)
 	{
 		if( this->hidden->gapiInfo->suspended )
 		{
 			this->hidden->gapiInfo->suspended = 0;
 		}
 	}
 #endif

 #else
 	ShowWindow(SDL_Window, SW_RESTORE);
 #endif

 #ifndef NO_CHANGEDISPLAYSETTINGS
 #ifndef _WIN32_WCE
 	ChangeDisplaySettings(&SDL_fullscreen_mode, CDS_FULLSCREEN);
 #endif
 #endif /* NO_CHANGEDISPLAYSETTINGS */
 }
 static void SDL_RestoreDesktopMode(void)
 {

 #ifdef _WIN32_WCE

 #ifdef SDL_VIDEO_DRIVER_GAPI
 	SDL_VideoDevice *this = current_video;
 	if(SDL_strcmp(this->name, "gapi") == 0)
 	{
 		if( !this->hidden->gapiInfo->suspended )
 		{
 			this->hidden->gapiInfo->suspended = 1;
 		}
 	}
 #endif

 #else
 	/* WinCE does not have a taskbar, so minimizing is not convenient */
 	ShowWindow(SDL_Window, SW_MINIMIZE);
 #endif

 #ifndef NO_CHANGEDISPLAYSETTINGS
 #ifndef _WIN32_WCE
 	ChangeDisplaySettings(NULL, 0);
 #endif
 #endif /* NO_CHANGEDISPLAYSETTINGS */
 }

 #ifdef WM_MOUSELEAVE
 /*
    Special code to handle mouse leave events - this sucks...
    http://support.microsoft.com/support/kb/articles/q183/1/07.asp

    TrackMouseEvent() is only available on Win98 and WinNT.
    _TrackMouseEvent() is available on Win95, but isn't yet in the mingw32
    development environment, and only works on systems that have had IE 3.0
    or newer installed on them (which is not the case with the base Win95).
    Therefore, we implement our own version of _TrackMouseEvent() which
    uses our own implementation if TrackMouseEvent() is not available.
 */
 static BOOL (WINAPI *_TrackMouseEvent)(TRACKMOUSEEVENT *ptme) = NULL;

 static VOID CALLBACK
 TrackMouseTimerProc(HWND hWnd, UINT uMsg, UINT idEvent, DWORD dwTime)
 {
 	RECT rect;
 	POINT pt;

 	GetClientRect(hWnd, &rect);
 	MapWindowPoints(hWnd, NULL, (LPPOINT)&rect, 2);
 	GetCursorPos(&pt);
 	if ( !PtInRect(&rect, pt) || (WindowFromPoint(pt) != hWnd) ) {
 		if ( !KillTimer(hWnd, idEvent) ) {
 			/* Error killing the timer! */
 		}
 		PostMessage(hWnd, WM_MOUSELEAVE, 0, 0);
 	}
 }
 static BOOL WINAPI WIN_TrackMouseEvent(TRACKMOUSEEVENT *ptme)
 {
 	if ( ptme->dwFlags == TME_LEAVE ) {
 		return SetTimer(ptme->hwndTrack, ptme->dwFlags, 100,
 		                (TIMERPROC)TrackMouseTimerProc) != 0;
 	}
 	return FALSE;
 }
 #endif /* WM_MOUSELEAVE */

 /* Function to retrieve the current keyboard modifiers */
 static void WIN_GetKeyboardState(void)
 {
 #ifndef NO_GETKEYBOARDSTATE
 	SDLMod state;
 	BYTE keyboard[256];
 	Uint8 *kstate = SDL_GetKeyState(NULL);

 	state = KMOD_NONE;
 	if ( GetKeyboardState(keyboard) ) {
 		if ( keyboard[VK_LSHIFT] & 0x80) {
 			state |= KMOD_LSHIFT;
 			kstate[SDLK_LSHIFT] = SDL_PRESSED;
 		}
 		if ( keyboard[VK_RSHIFT] & 0x80) {
 			state |= KMOD_RSHIFT;
 			kstate[SDLK_RSHIFT] = SDL_PRESSED;
 		}
 		if ( keyboard[VK_LCONTROL] & 0x80) {
 			state |= KMOD_LCTRL;
 			kstate[SDLK_LCTRL] = SDL_PRESSED;
 		}
 		if ( keyboard[VK_RCONTROL] & 0x80) {
 			state |= KMOD_RCTRL;
 			kstate[SDLK_RCTRL] = SDL_PRESSED;
 		}
 		if ( keyboard[VK_LMENU] & 0x80) {
 			state |= KMOD_LALT;
 			kstate[SDLK_LALT] = SDL_PRESSED;
 		}
 		if ( keyboard[VK_RMENU] & 0x80) {
 			state |= KMOD_RALT;
 			kstate[SDLK_RALT] = SDL_PRESSED;
 		}
 		if ( keyboard[VK_NUMLOCK] & 0x01) {
 			state |= KMOD_NUM;
 			kstate[SDLK_NUMLOCK] = SDL_PRESSED;
 		}
 		if ( keyboard[VK_CAPITAL] & 0x01) {
 			state |= KMOD_CAPS;
 			kstate[SDLK_CAPSLOCK] = SDL_PRESSED;
 		}
 	}
 	SDL_SetModState(state);
 #endif /* !NO_GETKEYBOARDSTATE */
 }

 /* The main Win32 event handler
 DJM: This is no longer static as (DX5/DIB)_CreateWindow needs it
 */
 LRESULT CALLBACK WinMessage(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
 	SDL_VideoDevice *this = current_video;
 	static int mouse_pressed = 0;
 #ifdef WMMSG_DEBUG
 	fprintf(stderr, "Received windows message:  ");
 	if ( msg > MAX_WMMSG ) {
 		fprintf(stderr, "%d", msg);
 	} else {
 		fprintf(stderr, "%s", wmtab[msg]);
 	}
 	fprintf(stderr, " -- 0x%X, 0x%X\n", wParam, lParam);
 #endif
 	switch (msg) {

 		case WM_ACTIVATE: {
 			SDL_VideoDevice *this = current_video;
 			BOOL active, minimized;
 			Uint8 appstate;

 			minimized = HIWORD(wParam);
 			active = (LOWORD(wParam) != WA_INACTIVE) && !minimized;
 			if ( active ) {
 				/* Gain the following states */
 				appstate = SDL_APPACTIVE|SDL_APPINPUTFOCUS;
 				if ( this->input_grab != SDL_GRAB_OFF ) {
 					WIN_GrabInput(this, SDL_GRAB_ON);
 				}
 				if ( !(SDL_GetAppState()&SDL_APPINPUTFOCUS) ) {
 					if ( ! DDRAW_FULLSCREEN() ) {
 						DIB_SwapGamma(this);
 					}
 					if ( WINDIB_FULLSCREEN() ) {
 						SDL_RestoreGameMode();
 					}
 				}
 #if defined(_WIN32_WCE)
 				if ( WINDIB_FULLSCREEN() ) {
 					LoadAygshell();
 					if( SHFullScreen )
 						SHFullScreen(SDL_Window, SHFS_HIDESTARTICON|SHFS_HIDETASKBAR|SHFS_HIDESIPBUTTON);
 					else
 						ShowWindow(FindWindow(TEXT("HHTaskBar"),NULL),SW_HIDE);
 				}
 #endif
 				posted = SDL_PrivateAppActive(1, appstate);
 				WIN_GetKeyboardState();
 			} else {
 				/* Lose the following states */
 				appstate = SDL_APPINPUTFOCUS;
 				if ( minimized ) {
 					appstate |= SDL_APPACTIVE;
 				}
 				if ( this->input_grab != SDL_GRAB_OFF ) {
 					WIN_GrabInput(this, SDL_GRAB_OFF);
 				}
 				if ( SDL_GetAppState() & SDL_APPINPUTFOCUS ) {
 					if ( ! DDRAW_FULLSCREEN() ) {
 						DIB_SwapGamma(this);
 					}
 					if ( WINDIB_FULLSCREEN() ) {
 						SDL_RestoreDesktopMode();
 #if defined(_WIN32_WCE)
 						LoadAygshell();
 						if( SHFullScreen )
 							SHFullScreen(SDL_Window, SHFS_SHOWSTARTICON|SHFS_SHOWTASKBAR|SHFS_SHOWSIPBUTTON);
 						else
 							ShowWindow(FindWindow(TEXT("HHTaskBar"),NULL),SW_SHOW);
 #endif
 					}
 				}
 				posted = SDL_PrivateAppActive(0, appstate);
 			}
 			WIN_Activate(this, active, minimized);
 			return(0);
 		}
 		break;

 		case WM_MOUSEMOVE: {

 #ifdef WM_MOUSELEAVE
 			/* No need to handle SDL_APPMOUSEFOCUS when fullscreen */
 			if ( SDL_VideoSurface && !FULLSCREEN() ) {
 				/* mouse has entered the window */

 				if ( !(SDL_GetAppState() & SDL_APPMOUSEFOCUS) ) {
 					TRACKMOUSEEVENT tme;

 					tme.cbSize = sizeof(tme);
 					tme.dwFlags = TME_LEAVE;
 					tme.hwndTrack = SDL_Window;
 					_TrackMouseEvent(&tme);
 				}
 			}
 #endif /* WM_MOUSELEAVE */

 			/* Mouse motion is handled in DIB_PumpEvents or
 			 * DX5_PumpEvents, depending on the video driver
 			 * in use */

 			posted = SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);
 		}
 		return(0);

 #ifdef WM_MOUSELEAVE
 		case WM_MOUSELEAVE: {

 			/* No need to handle SDL_APPMOUSEFOCUS when fullscreen */
 			if ( SDL_VideoSurface && !FULLSCREEN() ) {
 				/* mouse has left the window */
 				/* or */
 				/* Elvis has left the building! */
 				posted = SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);
 			}
 		}
 		return(0);
 #endif /* WM_MOUSELEAVE */

 		case WM_LBUTTONDOWN:
 		case WM_LBUTTONUP:
 		case WM_MBUTTONDOWN:
 		case WM_MBUTTONUP:
 		case WM_RBUTTONDOWN:
 		case WM_RBUTTONUP:
 		case WM_XBUTTONDOWN:
 		case WM_XBUTTONUP: {
 			/* Mouse is handled by DirectInput when fullscreen */
 			if ( SDL_VideoSurface && ! DINPUT() ) {
 				WORD xbuttonval = 0;
 				Uint8 button, state;

 				/* DJM:
 				   We want the SDL window to take focus so that
 				   it acts like a normal windows "component"
 				   (e.g. gains keyboard focus on a mouse click).
 				 */
 				SetFocus(SDL_Window);

 				/* Figure out which button to use */
 				switch (msg) {
 					case WM_LBUTTONDOWN:
 						button = SDL_BUTTON_LEFT;
 						state = SDL_PRESSED;
 						break;
 					case WM_LBUTTONUP:
 						button = SDL_BUTTON_LEFT;
 						state = SDL_RELEASED;
 						break;
 					case WM_MBUTTONDOWN:
 						button = SDL_BUTTON_MIDDLE;
 						state = SDL_PRESSED;
 						break;
 					case WM_MBUTTONUP:
 						button = SDL_BUTTON_MIDDLE;
 						state = SDL_RELEASED;
 						break;
 					case WM_RBUTTONDOWN:
 						button = SDL_BUTTON_RIGHT;
 						state = SDL_PRESSED;
 						break;
 					case WM_RBUTTONUP:
 						button = SDL_BUTTON_RIGHT;
 						state = SDL_RELEASED;
 						break;
 					case WM_XBUTTONDOWN:
 						xbuttonval = GET_XBUTTON_WPARAM(wParam);
 						button = SDL_BUTTON_X1 + xbuttonval - 1;
 						state = SDL_PRESSED;
 						break;
 					case WM_XBUTTONUP:
 						xbuttonval = GET_XBUTTON_WPARAM(wParam);
 						button = SDL_BUTTON_X1 + xbuttonval - 1;
 						state = SDL_RELEASED;
 						break;
 					default:
 						/* Eh? Unknown button? */
 						return(0);
 				}
 				if ( state == SDL_PRESSED ) {
 					/* Grab mouse so we get up events */
 					if ( ++mouse_pressed > 0 ) {
 						SetCapture(hwnd);
 					}
 				} else {
 					/* Release mouse after all up events */
 					if ( --mouse_pressed <= 0 ) {
 						ReleaseCapture();
 						mouse_pressed = 0;
 					}
 				}
 				posted = SDL_PrivateMouseButton(
 							state, button, 0, 0);

 				/*
 				 * MSDN says:
 				 *  "Unlike the WM_LBUTTONUP, WM_MBUTTONUP, and WM_RBUTTONUP
 				 *   messages, an application should return TRUE from [an
 				 *   XBUTTON message] if it processes it. Doing so will allow
 				 *   software that simulates this message on Microsoft Windows
 				 *   systems earlier than Windows 2000 to determine whether
 				 *   the window procedure processed the message or called
 				 *   DefWindowProc to process it.
 				 */
 				if (xbuttonval > 0)
 					return(TRUE);
 			}
 		}
 		return(0);


 #if (_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400)
 		case WM_MOUSEWHEEL:
 			if ( SDL_VideoSurface && ! DINPUT() ) {
 				int move = (short)HIWORD(wParam);
 				if ( move ) {
 					Uint8 button;
 					if ( move > 0 )
 						button = SDL_BUTTON_WHEELUP;
 					else
 						button = SDL_BUTTON_WHEELDOWN;
 					posted = SDL_PrivateMouseButton(
 						SDL_PRESSED, button, 0, 0);
 					posted |= SDL_PrivateMouseButton(
 						SDL_RELEASED, button, 0, 0);
 				}
 			}
 			return(0);
 #endif

 #ifdef WM_GETMINMAXINFO
 		/* This message is sent as a way for us to "check" the values
 		 * of a position change.  If we don't like it, we can adjust
 		 * the values before they are changed.
 		 */
 		case WM_GETMINMAXINFO: {
 			MINMAXINFO *info;
 			RECT        size;
 			int x, y;
 			int style;
 			int width;
 			int height;

 			/* We don't want to clobber an internal resize */
 			if ( SDL_resizing )
 				return(0);

 			/* We allow resizing with the SDL_RESIZABLE flag */
 			if ( SDL_PublicSurface &&
 				(SDL_PublicSurface->flags & SDL_RESIZABLE) ) {
 				return(0);
 			}

 			/* Get the current position of our window */
 			GetWindowRect(SDL_Window, &size);
 			x = size.left;
 			y = size.top;

 			/* Calculate current width and height of our window */
 			size.top = 0;
 			size.left = 0;
 			if ( SDL_PublicSurface != NULL ) {
 				size.bottom = SDL_PublicSurface->h;
 				size.right = SDL_PublicSurface->w;
 			} else {
 				size.bottom = 0;
 				size.right = 0;
 			}

 			/* DJM - according to the docs for GetMenu(), the
 			   return value is undefined if hwnd is a child window.
 			   Aparently it's too difficult for MS to check
 			   inside their function, so I have to do it here.
           		 */
          		style = GetWindowLong(hwnd, GWL_STYLE);
          		AdjustWindowRect(
 				&size,
 				style,
             			style & WS_CHILDWINDOW ? FALSE
 						       : GetMenu(hwnd) != NULL);

 			width = size.right - size.left;
 			height = size.bottom - size.top;

 			/* Fix our size to the current size */
 			info = (MINMAXINFO *)lParam;
 			info->ptMaxSize.x = width;
 			info->ptMaxSize.y = height;
 			info->ptMaxPosition.x = x;
 			info->ptMaxPosition.y = y;
 			info->ptMinTrackSize.x = width;
 			info->ptMinTrackSize.y = height;
 			info->ptMaxTrackSize.x = width;
 			info->ptMaxTrackSize.y = height;
 		}
 		return(0);
 #endif /* WM_GETMINMAXINFO */

 		case WM_WINDOWPOSCHANGING: {
 			WINDOWPOS *windowpos = (WINDOWPOS*)lParam;

 			/* When menu is at the side or top, Windows likes
 			   to try to reposition the fullscreen window when
 			   changing video modes.
 			 */
 			if ( !SDL_resizing &&
 			     SDL_PublicSurface &&
 			     (SDL_PublicSurface->flags & SDL_FULLSCREEN) ) {
 				windowpos->x = 0;
 				windowpos->y = 0;
 			}
 		}
 		return(0);

 		case WM_WINDOWPOSCHANGED: {
 			SDL_VideoDevice *this = current_video;
 			int w, h;

 			GetClientRect(SDL_Window, &SDL_bounds);
 			ClientToScreen(SDL_Window, (LPPOINT)&SDL_bounds);
 			ClientToScreen(SDL_Window, (LPPOINT)&SDL_bounds+1);
 			if ( !SDL_resizing && !IsZoomed(SDL_Window) &&
 			     SDL_PublicSurface &&
 				!(SDL_PublicSurface->flags & SDL_FULLSCREEN) ) {
 				SDL_windowX = SDL_bounds.left;
 				SDL_windowY = SDL_bounds.top;
 			}
 			w = SDL_bounds.right-SDL_bounds.left;
 			h = SDL_bounds.bottom-SDL_bounds.top;
 			if ( this->input_grab != SDL_GRAB_OFF ) {
 				ClipCursor(&SDL_bounds);
 			}
 			if ( SDL_PublicSurface &&
 				(SDL_PublicSurface->flags & SDL_RESIZABLE) ) {
 				SDL_PrivateResize(w, h);
 			}
 		}
 		break;

 		/* We need to set the cursor */
 		case WM_SETCURSOR: {
 			Uint16 hittest;

 			hittest = LOWORD(lParam);
 			if ( hittest == HTCLIENT ) {
 				SetCursor(SDL_hcursor);
 				return(TRUE);
 			}
 		}
 		break;

 		/* We are about to get palette focus! */
 		case WM_QUERYNEWPALETTE: {
 			WIN_RealizePalette(current_video);
 			return(TRUE);
 		}
 		break;

 		/* Another application changed the palette */
 		case WM_PALETTECHANGED: {
 			WIN_PaletteChanged(current_video, (HWND)wParam);
 		}
 		break;

 		/* We were occluded, refresh our display */
 		case WM_PAINT: {
 			HDC hdc;
 			PAINTSTRUCT ps;

 			hdc = BeginPaint(SDL_Window, &ps);
 			if ( current_video->screen &&
 			     !(current_video->screen->flags & SDL_OPENGL) ) {
 				WIN_WinPAINT(current_video, hdc);
 			}
 			EndPaint(SDL_Window, &ps);
 		}
 		return(0);

 		/* DJM: Send an expose event in this case */
 		case WM_ERASEBKGND: {
 			posted = SDL_PrivateExpose();
 		}
 		return(0);

 		case WM_CLOSE: {
 			if ( (posted = SDL_PrivateQuit()) )
 				PostQuitMessage(0);
 		}
 		return(0);

 		case WM_DESTROY: {
 			PostQuitMessage(0);
 		}
 		return(0);

 #ifndef NO_GETKEYBOARDSTATE
 		case WM_INPUTLANGCHANGE: {
 			codepage = GetCodePage();
 		}
 		return(TRUE);
 #endif

 		default: {
 			/* Special handling by the video driver */
 			if (HandleMessage) {
 				return(HandleMessage(current_video,
 			                     hwnd, msg, wParam, lParam));
 			}
 		}
 		break;
 	}
 	return(DefWindowProc(hwnd, msg, wParam, lParam));
 }

 /* Allow the application handle to be stored and retrieved later */
 static void *SDL_handle = NULL;

 void SDL_SetModuleHandle(void *handle)
 {
 	SDL_handle = handle;
 }
 void *SDL_GetModuleHandle(void)
 {
 	void *handle;

 	if ( SDL_handle ) {
 		handle = SDL_handle;
 	} else {
 		handle = GetModuleHandle(NULL);
 	}
 	return(handle);
 }

 /* This allows the SDL_WINDOWID hack */
 BOOL SDL_windowid = FALSE;

 static int app_registered = 0;

 /* Register the class for this application -- exported for winmain.c */
 int SDL_RegisterApp(char *name, Uint32 style, void *hInst)
 {
 	WNDCLASS class;
 #ifdef WM_MOUSELEAVE
 	HMODULE handle;
 #endif

 	/* Only do this once... */
 	if ( app_registered ) {
 		++app_registered;
 		return(0);
 	}

 #ifndef CS_BYTEALIGNCLIENT
 #define CS_BYTEALIGNCLIENT	0
 #endif
 	if ( ! name && ! SDL_Appname ) {
 		name = "SDL_app";
 		SDL_Appstyle = CS_BYTEALIGNCLIENT;
 		SDL_Instance = hInst ? hInst : SDL_GetModuleHandle();
 	}

 	if ( name ) {
 #ifdef _WIN32_WCE
 		/* WinCE uses the UNICODE version */
 		SDL_Appname = SDL_iconv_utf8_ucs2(name);
 #else
 		SDL_Appname = SDL_iconv_utf8_locale(name);
 #endif /* _WIN32_WCE */
 		SDL_Appstyle = style;
 		SDL_Instance = hInst ? hInst : SDL_GetModuleHandle();
 	}

 	/* Register the application class */
 	class.hCursor		= NULL;
 	class.hIcon		= LoadImage(SDL_Instance, SDL_Appname,
 				            IMAGE_ICON,
 	                                    0, 0, LR_DEFAULTCOLOR);
 	class.lpszMenuName	= NULL;
 	class.lpszClassName	= SDL_Appname;
 	class.hbrBackground	= NULL;
 	class.hInstance		= SDL_Instance;
 	class.style		= SDL_Appstyle;
 #if SDL_VIDEO_OPENGL
 	class.style		|= CS_OWNDC;
 #endif
 	class.lpfnWndProc	= WinMessage;
 	class.cbWndExtra	= 0;
 	class.cbClsExtra	= 0;
 	if ( ! RegisterClass(&class) ) {
 		SDL_SetError("Couldn't register application class");
 		return(-1);
 	}

 #ifdef WM_MOUSELEAVE
 	/* Get the version of TrackMouseEvent() we use */
 	_TrackMouseEvent = NULL;
 	handle = GetModuleHandle("USER32.DLL");
 	if ( handle ) {
 		_TrackMouseEvent = (BOOL (WINAPI *)(TRACKMOUSEEVENT *))GetProcAddress(handle, "TrackMouseEvent");
 	}
 	if ( _TrackMouseEvent == NULL ) {
 		_TrackMouseEvent = WIN_TrackMouseEvent;
 	}
 #endif /* WM_MOUSELEAVE */

 #ifndef NO_GETKEYBOARDSTATE
 	/* Initialise variables for SDL_ToUnicode() */
 	codepage = GetCodePage();
 	SDL_ToUnicode = Is9xME() ? ToUnicode9xME : ToUnicode;
 #endif

 	app_registered = 1;
 	return(0);
 }

 /* Unregisters the windowclass registered in SDL_RegisterApp above. */
 void SDL_UnregisterApp()
 {
 	WNDCLASS class;

 	/* SDL_RegisterApp might not have been called before */
 	if ( !app_registered ) {
 		return;
 	}
 	--app_registered;
 	if ( app_registered == 0 ) {
 		/* Check for any registered window classes. */
 		if ( GetClassInfo(SDL_Instance, SDL_Appname, &class) ) {
 			UnregisterClass(SDL_Appname, SDL_Instance);
 		}
 		SDL_free(SDL_Appname);
 		SDL_Appname = NULL;
 	}
 }

 #ifndef NO_GETKEYBOARDSTATE
 /* JFP: Implementation of ToUnicode() that works on 9x/ME/2K/XP */

 static int Is9xME()
 {
 	OSVERSIONINFO   info;

 	SDL_memset(&info, 0, sizeof(info));
 	info.dwOSVersionInfoSize = sizeof(info);
 	if (!GetVersionEx(&info)) {
 		return 0;
 	}
 	return (info.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS);
 }

 static int GetCodePage()
 {
 	char	buff[8];
 	int	lcid = MAKELCID(LOWORD(GetKeyboardLayout(0)), SORT_DEFAULT);
 	int	cp = GetACP();

 	if (GetLocaleInfo(lcid, LOCALE_IDEFAULTANSICODEPAGE, buff, sizeof(buff))) {
 		cp = SDL_atoi(buff);
 	}
 	return cp;
 }

 static int WINAPI ToUnicode9xME(UINT vkey, UINT scancode, PBYTE keystate, LPWSTR wchars, int wsize, UINT flags)
 {
 	BYTE	chars[2];

 	if (ToAsciiEx(vkey, scancode, keystate, (WORD*)chars, 0, GetKeyboardLayout(0)) == 1) {
 		return MultiByteToWideChar(codepage, 0, chars, 1, wchars, wsize);
 	}
 	return 0;
 }

 #endif /* !NO_GETKEYBOARDSTATE */
	/*
	SDL - Simple DirectMedia Layer
	Copyright (C) 1997-2009 Sam Lantinga

	This library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 of the License, or (at your option) any later version.

	This library is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with this library; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

	Sam Lantinga
	slouken@libsdl.org
	*/
	#include "SDL_config.h"

	#define WIN32_LEAN_AND_MEAN
	#include <windows.h>

	/* Make sure XBUTTON stuff is defined that isn't in older Platform SDKs... */
	#ifndef WM_XBUTTONDOWN
	#define WM_XBUTTONDOWN 0x020B
	#endif
	#ifndef WM_XBUTTONUP
	#define WM_XBUTTONUP 0x020C
	#endif
	#ifndef GET_XBUTTON_WPARAM
	#define GET_XBUTTON_WPARAM(w) (HIWORD(w))
	#endif

	#include "SDL_events.h"
	#include "SDL_video.h"
	#include "SDL_syswm.h"
	#include "../SDL_sysvideo.h"
	#include "../../events/SDL_sysevents.h"
	#include "../../events/SDL_events_c.h"
	#include "SDL_lowvideo.h"
	#include "SDL_syswm_c.h"
	#include "SDL_main.h"
	#include "SDL_loadso.h"

	#ifdef WMMSG_DEBUG
	#include "wmmsg.h"
	#endif

	#include "../windib/SDL_gapidibvideo.h"

	#ifdef SDL_VIDEO_DRIVER_GAPI
	#include "../gapi/SDL_gapivideo.h"
	#endif

	#ifdef _WIN32_WCE
	#define IsZoomed(HWND) 1
	#define NO_GETKEYBOARDSTATE
	#if _WIN32_WCE < 420
	#define NO_CHANGEDISPLAYSETTINGS
	#endif
	#endif

	/* The window we use for everything... */
	#ifdef _WIN32_WCE
	LPWSTR SDL_Appname = NULL;
	#else
	LPSTR SDL_Appname = NULL;
	#endif
	Uint32 SDL_Appstyle = 0;
	HINSTANCE SDL_Instance = NULL;
	HWND SDL_Window = NULL;
	RECT SDL_bounds = {0, 0, 0, 0};
	int SDL_windowX = 0;
	int SDL_windowY = 0;
	int SDL_resizing = 0;
	int mouse_relative = 0;
	int posted = 0;
	#ifndef NO_CHANGEDISPLAYSETTINGS
	DEVMODE SDL_desktop_mode;
	DEVMODE SDL_fullscreen_mode;
	#endif
	WORD *gamma_saved = NULL;


	/* Functions called by the message processing function */
	LONG (*HandleMessage)(_THIS, HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)=NULL;
	void (*WIN_Activate)(_THIS, BOOL active, BOOL iconic);
	void (*WIN_RealizePalette)(_THIS);
	void (*WIN_PaletteChanged)(_THIS, HWND window);
	void (*WIN_WinPAINT)(_THIS, HDC hdc);
	extern void DIB_SwapGamma(_THIS);

	#ifndef NO_GETKEYBOARDSTATE
	/* Variables and support functions for SDL_ToUnicode() */
	static int codepage;
	static int Is9xME();
	static int GetCodePage();
	static int WINAPI ToUnicode9xME(UINT vkey, UINT scancode, BYTE *keystate, LPWSTR wchars, int wsize, UINT flags);

	ToUnicodeFN SDL_ToUnicode = ToUnicode9xME;
	#endif /* !NO_GETKEYBOARDSTATE */


	#if defined(_WIN32_WCE)

	//AdjustWindowRect is not available under WinCE 2003
	#define AdjustWindowRect(a,b,c) (AdjustWindowRectEx((a),(b),(c),0))

	// dynamically load aygshell dll because we want SDL to work on HPC and be300
	HINSTANCE aygshell = NULL;
	BOOL (WINAPI *SHFullScreen)(HWND hwndRequester, DWORD dwState) = 0;

	#define SHFS_SHOWTASKBAR 0x0001
	#define SHFS_HIDETASKBAR 0x0002
	#define SHFS_SHOWSIPBUTTON 0x0004
	#define SHFS_HIDESIPBUTTON 0x0008
	#define SHFS_SHOWSTARTICON 0x0010
	#define SHFS_HIDESTARTICON 0x0020

	static void LoadAygshell(void)
	{
	if( !aygshell )
	aygshell = SDL_LoadObject("aygshell.dll");
	if( (aygshell != 0) && (SHFullScreen == 0) )
	{
	SHFullScreen = (int (WINAPI )(struct HWND__ ,unsigned long)) SDL_LoadFunction(aygshell, "SHFullScreen");
	}
	}

	#endif

	/* JC 14 Mar 2006
	This is used all over the place, in the windib driver and in the dx5 driver
	So we may as well stick it here instead of having multiple copies scattered
	about
	*/
	void WIN_FlushMessageQueue()
	{
	MSG msg;
	while ( PeekMessage(&msg, NULL, 0, 0, PM_REMOVE) ) {
	if ( msg.message == WM_QUIT ) break;
	TranslateMessage( &msg );
	DispatchMessage( &msg );
	}
	}

	static void SDL_RestoreGameMode(void)
	{
	#ifdef _WIN32_WCE //Under ce we don't minimize, therefore no restore

	#ifdef SDL_VIDEO_DRIVER_GAPI
	SDL_VideoDevice *this = current_video;
	if(SDL_strcmp(this->name, "gapi") == 0)
	{
	if( this->hidden->gapiInfo->suspended )
	{
	this->hidden->gapiInfo->suspended = 0;
	}
	}
	#endif

	#else
	ShowWindow(SDL_Window, SW_RESTORE);
	#endif

	#ifndef NO_CHANGEDISPLAYSETTINGS
	#ifndef _WIN32_WCE
	ChangeDisplaySettings(&SDL_fullscreen_mode, CDS_FULLSCREEN);
	#endif
	#endif /* NO_CHANGEDISPLAYSETTINGS */
	}
	static void SDL_RestoreDesktopMode(void)
	{

	#ifdef _WIN32_WCE

	#ifdef SDL_VIDEO_DRIVER_GAPI
	SDL_VideoDevice *this = current_video;
	if(SDL_strcmp(this->name, "gapi") == 0)
	{
	if( !this->hidden->gapiInfo->suspended )
	{
	this->hidden->gapiInfo->suspended = 1;
	}
	}
	#endif

	#else
	/* WinCE does not have a taskbar, so minimizing is not convenient */
	ShowWindow(SDL_Window, SW_MINIMIZE);
	#endif

	#ifndef NO_CHANGEDISPLAYSETTINGS
	#ifndef _WIN32_WCE
	ChangeDisplaySettings(NULL, 0);
	#endif
	#endif /* NO_CHANGEDISPLAYSETTINGS */
	}

	#ifdef WM_MOUSELEAVE
	/*
	Special code to handle mouse leave events - this sucks...
	http://support.microsoft.com/support/kb/articles/q183/1/07.asp

	TrackMouseEvent() is only available on Win98 and WinNT.
	_TrackMouseEvent() is available on Win95, but isn't yet in the mingw32
	development environment, and only works on systems that have had IE 3.0
	or newer installed on them (which is not the case with the base Win95).
	Therefore, we implement our own version of _TrackMouseEvent() which
	uses our own implementation if TrackMouseEvent() is not available.
	*/
	static BOOL (WINAPI _TrackMouseEvent)(TRACKMOUSEEVENT ptme) = NULL;

	static VOID CALLBACK
	TrackMouseTimerProc(HWND hWnd, UINT uMsg, UINT idEvent, DWORD dwTime)
	{
	RECT rect;
	POINT pt;

	GetClientRect(hWnd, &rect);
	MapWindowPoints(hWnd, NULL, (LPPOINT)&rect, 2);
	GetCursorPos(&pt);
	if ( !PtInRect(&rect, pt) \|\| (WindowFromPoint(pt) != hWnd) ) {
	if ( !KillTimer(hWnd, idEvent) ) {
	/* Error killing the timer! */
	}
	PostMessage(hWnd, WM_MOUSELEAVE, 0, 0);
	}
	}
	static BOOL WINAPI WIN_TrackMouseEvent(TRACKMOUSEEVENT *ptme)
	{
	if ( ptme->dwFlags == TME_LEAVE ) {
	return SetTimer(ptme->hwndTrack, ptme->dwFlags, 100,
	(TIMERPROC)TrackMouseTimerProc) != 0;
	}
	return FALSE;
	}
	#endif /* WM_MOUSELEAVE */

	/* Function to retrieve the current keyboard modifiers */
	static void WIN_GetKeyboardState(void)
	{
	#ifndef NO_GETKEYBOARDSTATE
	SDLMod state;
	BYTE keyboard[256];
	Uint8 *kstate = SDL_GetKeyState(NULL);

	state = KMOD_NONE;
	if ( GetKeyboardState(keyboard) ) {
	if ( keyboard[VK_LSHIFT] & 0x80) {
	state \|= KMOD_LSHIFT;
	kstate[SDLK_LSHIFT] = SDL_PRESSED;
	}
	if ( keyboard[VK_RSHIFT] & 0x80) {
	state \|= KMOD_RSHIFT;
	kstate[SDLK_RSHIFT] = SDL_PRESSED;
	}
	if ( keyboard[VK_LCONTROL] & 0x80) {
	state \|= KMOD_LCTRL;
	kstate[SDLK_LCTRL] = SDL_PRESSED;
	}
	if ( keyboard[VK_RCONTROL] & 0x80) {
	state \|= KMOD_RCTRL;
	kstate[SDLK_RCTRL] = SDL_PRESSED;
	}
	if ( keyboard[VK_LMENU] & 0x80) {
	state \|= KMOD_LALT;
	kstate[SDLK_LALT] = SDL_PRESSED;
	}
	if ( keyboard[VK_RMENU] & 0x80) {
	state \|= KMOD_RALT;
	kstate[SDLK_RALT] = SDL_PRESSED;
	}
	if ( keyboard[VK_NUMLOCK] & 0x01) {
	state \|= KMOD_NUM;
	kstate[SDLK_NUMLOCK] = SDL_PRESSED;
	}
	if ( keyboard[VK_CAPITAL] & 0x01) {
	state \|= KMOD_CAPS;
	kstate[SDLK_CAPSLOCK] = SDL_PRESSED;
	}
	}
	SDL_SetModState(state);
	#endif /* !NO_GETKEYBOARDSTATE */
	}

	/* The main Win32 event handler
	DJM: This is no longer static as (DX5/DIB)_CreateWindow needs it
	*/
	LRESULT CALLBACK WinMessage(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
	{
	SDL_VideoDevice *this = current_video;
	static int mouse_pressed = 0;
	#ifdef WMMSG_DEBUG
	fprintf(stderr, "Received windows message: ");
	if ( msg > MAX_WMMSG ) {
	fprintf(stderr, "%d", msg);
	} else {
	fprintf(stderr, "%s", wmtab[msg]);
	}
	fprintf(stderr, " -- 0x%X, 0x%X\n", wParam, lParam);
	#endif
	switch (msg) {

	case WM_ACTIVATE: {
	SDL_VideoDevice *this = current_video;
	BOOL active, minimized;
	Uint8 appstate;

	minimized = HIWORD(wParam);
	active = (LOWORD(wParam) != WA_INACTIVE) && !minimized;
	if ( active ) {
	/* Gain the following states */
	appstate = SDL_APPACTIVE\|SDL_APPINPUTFOCUS;
	if ( this->input_grab != SDL_GRAB_OFF ) {
	WIN_GrabInput(this, SDL_GRAB_ON);
	}
	if ( !(SDL_GetAppState()&SDL_APPINPUTFOCUS) ) {
	if ( ! DDRAW_FULLSCREEN() ) {
	DIB_SwapGamma(this);
	}
	if ( WINDIB_FULLSCREEN() ) {
	SDL_RestoreGameMode();
	}
	}
	#if defined(_WIN32_WCE)
	if ( WINDIB_FULLSCREEN() ) {
	LoadAygshell();
	if( SHFullScreen )
	SHFullScreen(SDL_Window, SHFS_HIDESTARTICON\|SHFS_HIDETASKBAR\|SHFS_HIDESIPBUTTON);
	else
	ShowWindow(FindWindow(TEXT("HHTaskBar"),NULL),SW_HIDE);
	}
	#endif
	posted = SDL_PrivateAppActive(1, appstate);
	WIN_GetKeyboardState();
	} else {
	/* Lose the following states */
	appstate = SDL_APPINPUTFOCUS;
	if ( minimized ) {
	appstate \|= SDL_APPACTIVE;
	}
	if ( this->input_grab != SDL_GRAB_OFF ) {
	WIN_GrabInput(this, SDL_GRAB_OFF);
	}
	if ( SDL_GetAppState() & SDL_APPINPUTFOCUS ) {
	if ( ! DDRAW_FULLSCREEN() ) {
	DIB_SwapGamma(this);
	}
	if ( WINDIB_FULLSCREEN() ) {
	SDL_RestoreDesktopMode();
	#if defined(_WIN32_WCE)
	LoadAygshell();
	if( SHFullScreen )
	SHFullScreen(SDL_Window, SHFS_SHOWSTARTICON\|SHFS_SHOWTASKBAR\|SHFS_SHOWSIPBUTTON);
	else
	ShowWindow(FindWindow(TEXT("HHTaskBar"),NULL),SW_SHOW);
	#endif
	}
	}
	posted = SDL_PrivateAppActive(0, appstate);
	}
	WIN_Activate(this, active, minimized);
	return(0);
	}
	break;

	case WM_MOUSEMOVE: {

	#ifdef WM_MOUSELEAVE
	/* No need to handle SDL_APPMOUSEFOCUS when fullscreen */
	if ( SDL_VideoSurface && !FULLSCREEN() ) {
	/* mouse has entered the window */

	if ( !(SDL_GetAppState() & SDL_APPMOUSEFOCUS) ) {
	TRACKMOUSEEVENT tme;

	tme.cbSize = sizeof(tme);
	tme.dwFlags = TME_LEAVE;
	tme.hwndTrack = SDL_Window;
	_TrackMouseEvent(&tme);
	}
	}
	#endif /* WM_MOUSELEAVE */

	/* Mouse motion is handled in DIB_PumpEvents or
	* DX5_PumpEvents, depending on the video driver
	* in use */

	posted = SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);
	}
	return(0);

	#ifdef WM_MOUSELEAVE
	case WM_MOUSELEAVE: {

	/* No need to handle SDL_APPMOUSEFOCUS when fullscreen */
	if ( SDL_VideoSurface && !FULLSCREEN() ) {
	/* mouse has left the window */
	/* or */
	/* Elvis has left the building! */
	posted = SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);
	}
	}
	return(0);
	#endif /* WM_MOUSELEAVE */

	case WM_LBUTTONDOWN:
	case WM_LBUTTONUP:
	case WM_MBUTTONDOWN:
	case WM_MBUTTONUP:
	case WM_RBUTTONDOWN:
	case WM_RBUTTONUP:
	case WM_XBUTTONDOWN:
	case WM_XBUTTONUP: {
	/* Mouse is handled by DirectInput when fullscreen */
	if ( SDL_VideoSurface && ! DINPUT() ) {
	WORD xbuttonval = 0;
	Uint8 button, state;

	/* DJM:
	We want the SDL window to take focus so that
	it acts like a normal windows "component"
	(e.g. gains keyboard focus on a mouse click).
	*/
	SetFocus(SDL_Window);

	/* Figure out which button to use */
	switch (msg) {
	case WM_LBUTTONDOWN:
	button = SDL_BUTTON_LEFT;
	state = SDL_PRESSED;
	break;
	case WM_LBUTTONUP:
	button = SDL_BUTTON_LEFT;
	state = SDL_RELEASED;
	break;
	case WM_MBUTTONDOWN:
	button = SDL_BUTTON_MIDDLE;
	state = SDL_PRESSED;
	break;
	case WM_MBUTTONUP:
	button = SDL_BUTTON_MIDDLE;
	state = SDL_RELEASED;
	break;
	case WM_RBUTTONDOWN:
	button = SDL_BUTTON_RIGHT;
	state = SDL_PRESSED;
	break;
	case WM_RBUTTONUP:
	button = SDL_BUTTON_RIGHT;
	state = SDL_RELEASED;
	break;
	case WM_XBUTTONDOWN:
	xbuttonval = GET_XBUTTON_WPARAM(wParam);
	button = SDL_BUTTON_X1 + xbuttonval - 1;
	state = SDL_PRESSED;
	break;
	case WM_XBUTTONUP:
	xbuttonval = GET_XBUTTON_WPARAM(wParam);
	button = SDL_BUTTON_X1 + xbuttonval - 1;
	state = SDL_RELEASED;
	break;
	default:
	/* Eh? Unknown button? */
	return(0);
	}
	if ( state == SDL_PRESSED ) {
	/* Grab mouse so we get up events */
	if ( ++mouse_pressed > 0 ) {
	SetCapture(hwnd);
	}
	} else {
	/* Release mouse after all up events */
	if ( --mouse_pressed <= 0 ) {
	ReleaseCapture();
	mouse_pressed = 0;
	}
	}
	posted = SDL_PrivateMouseButton(
	state, button, 0, 0);

	/*
	* MSDN says:
	* "Unlike the WM_LBUTTONUP, WM_MBUTTONUP, and WM_RBUTTONUP
	* messages, an application should return TRUE from [an
	* XBUTTON message] if it processes it. Doing so will allow
	* software that simulates this message on Microsoft Windows
	* systems earlier than Windows 2000 to determine whether
	* the window procedure processed the message or called
	* DefWindowProc to process it.
	*/
	if (xbuttonval > 0)
	return(TRUE);
	}
	}
	return(0);


	#if (_WIN32_WINNT >= 0x0400) \|\| (_WIN32_WINDOWS > 0x0400)
	case WM_MOUSEWHEEL:
	if ( SDL_VideoSurface && ! DINPUT() ) {
	int move = (short)HIWORD(wParam);
	if ( move ) {
	Uint8 button;
	if ( move > 0 )
	button = SDL_BUTTON_WHEELUP;
	else
	button = SDL_BUTTON_WHEELDOWN;
	posted = SDL_PrivateMouseButton(
	SDL_PRESSED, button, 0, 0);
	posted \|= SDL_PrivateMouseButton(
	SDL_RELEASED, button, 0, 0);
	}
	}
	return(0);
	#endif

	#ifdef WM_GETMINMAXINFO
	/* This message is sent as a way for us to "check" the values
	* of a position change. If we don't like it, we can adjust
	* the values before they are changed.
	*/
	case WM_GETMINMAXINFO: {
	MINMAXINFO *info;
	RECT size;
	int x, y;
	int style;
	int width;
	int height;

	/* We don't want to clobber an internal resize */
	if ( SDL_resizing )
	return(0);

	/* We allow resizing with the SDL_RESIZABLE flag */
	if ( SDL_PublicSurface &&
	(SDL_PublicSurface->flags & SDL_RESIZABLE) ) {
	return(0);
	}

	/* Get the current position of our window */
	GetWindowRect(SDL_Window, &size);
	x = size.left;
	y = size.top;

	/* Calculate current width and height of our window */
	size.top = 0;
	size.left = 0;
	if ( SDL_PublicSurface != NULL ) {
	size.bottom = SDL_PublicSurface->h;
	size.right = SDL_PublicSurface->w;
	} else {
	size.bottom = 0;
	size.right = 0;
	}

	/* DJM - according to the docs for GetMenu(), the
	return value is undefined if hwnd is a child window.
	Aparently it's too difficult for MS to check
	inside their function, so I have to do it here.
	*/
	style = GetWindowLong(hwnd, GWL_STYLE);
	AdjustWindowRect(
	&size,
	style,
	style & WS_CHILDWINDOW ? FALSE
	: GetMenu(hwnd) != NULL);

	width = size.right - size.left;
	height = size.bottom - size.top;

	/* Fix our size to the current size */
	info = (MINMAXINFO *)lParam;
	info->ptMaxSize.x = width;
	info->ptMaxSize.y = height;
	info->ptMaxPosition.x = x;
	info->ptMaxPosition.y = y;
	info->ptMinTrackSize.x = width;
	info->ptMinTrackSize.y = height;
	info->ptMaxTrackSize.x = width;
	info->ptMaxTrackSize.y = height;
	}
	return(0);
	#endif /* WM_GETMINMAXINFO */

	case WM_WINDOWPOSCHANGING: {
	WINDOWPOS windowpos = (WINDOWPOS)lParam;

	/* When menu is at the side or top, Windows likes
	to try to reposition the fullscreen window when
	changing video modes.
	*/
	if ( !SDL_resizing &&
	SDL_PublicSurface &&
	(SDL_PublicSurface->flags & SDL_FULLSCREEN) ) {
	windowpos->x = 0;
	windowpos->y = 0;
	}
	}
	return(0);

	case WM_WINDOWPOSCHANGED: {
	SDL_VideoDevice *this = current_video;
	int w, h;

	GetClientRect(SDL_Window, &SDL_bounds);
	ClientToScreen(SDL_Window, (LPPOINT)&SDL_bounds);
	ClientToScreen(SDL_Window, (LPPOINT)&SDL_bounds+1);
	if ( !SDL_resizing && !IsZoomed(SDL_Window) &&
	SDL_PublicSurface &&
	!(SDL_PublicSurface->flags & SDL_FULLSCREEN) ) {
	SDL_windowX = SDL_bounds.left;
	SDL_windowY = SDL_bounds.top;
	}
	w = SDL_bounds.right-SDL_bounds.left;
	h = SDL_bounds.bottom-SDL_bounds.top;
	if ( this->input_grab != SDL_GRAB_OFF ) {
	ClipCursor(&SDL_bounds);
	}
	if ( SDL_PublicSurface &&
	(SDL_PublicSurface->flags & SDL_RESIZABLE) ) {
	SDL_PrivateResize(w, h);
	}
	}
	break;

	/* We need to set the cursor */
	case WM_SETCURSOR: {
	Uint16 hittest;

	hittest = LOWORD(lParam);
	if ( hittest == HTCLIENT ) {
	SetCursor(SDL_hcursor);
	return(TRUE);
	}
	}
	break;

	/* We are about to get palette focus! */
	case WM_QUERYNEWPALETTE: {
	WIN_RealizePalette(current_video);
	return(TRUE);
	}
	break;

	/* Another application changed the palette */
	case WM_PALETTECHANGED: {
	WIN_PaletteChanged(current_video, (HWND)wParam);
	}
	break;

	/* We were occluded, refresh our display */
	case WM_PAINT: {
	HDC hdc;
	PAINTSTRUCT ps;

	hdc = BeginPaint(SDL_Window, &ps);
	if ( current_video->screen &&
	!(current_video->screen->flags & SDL_OPENGL) ) {
	WIN_WinPAINT(current_video, hdc);
	}
	EndPaint(SDL_Window, &ps);
	}
	return(0);

	/* DJM: Send an expose event in this case */
	case WM_ERASEBKGND: {
	posted = SDL_PrivateExpose();
	}
	return(0);

	case WM_CLOSE: {
	if ( (posted = SDL_PrivateQuit()) )
	PostQuitMessage(0);
	}
	return(0);

	case WM_DESTROY: {
	PostQuitMessage(0);
	}
	return(0);

	#ifndef NO_GETKEYBOARDSTATE
	case WM_INPUTLANGCHANGE: {
	codepage = GetCodePage();
	}
	return(TRUE);
	#endif

	default: {
	/* Special handling by the video driver */
	if (HandleMessage) {
	return(HandleMessage(current_video,
	hwnd, msg, wParam, lParam));
	}
	}
	break;
	}
	return(DefWindowProc(hwnd, msg, wParam, lParam));
	}

	/* Allow the application handle to be stored and retrieved later */
	static void *SDL_handle = NULL;

	void SDL_SetModuleHandle(void *handle)
	{
	SDL_handle = handle;
	}
	void *SDL_GetModuleHandle(void)
	{
	void *handle;

	if ( SDL_handle ) {
	handle = SDL_handle;
	} else {
	handle = GetModuleHandle(NULL);
	}
	return(handle);
	}

	/* This allows the SDL_WINDOWID hack */
	BOOL SDL_windowid = FALSE;

	static int app_registered = 0;

	/* Register the class for this application -- exported for winmain.c */
	int SDL_RegisterApp(char name, Uint32 style, void hInst)
	{
	WNDCLASS class;
	#ifdef WM_MOUSELEAVE
	HMODULE handle;
	#endif

	/* Only do this once... */
	if ( app_registered ) {
	++app_registered;
	return(0);
	}

	#ifndef CS_BYTEALIGNCLIENT
	#define CS_BYTEALIGNCLIENT 0
	#endif
	if ( ! name && ! SDL_Appname ) {
	name = "SDL_app";
	SDL_Appstyle = CS_BYTEALIGNCLIENT;
	SDL_Instance = hInst ? hInst : SDL_GetModuleHandle();
	}

	if ( name ) {
	#ifdef _WIN32_WCE
	/* WinCE uses the UNICODE version */
	SDL_Appname = SDL_iconv_utf8_ucs2(name);
	#else
	SDL_Appname = SDL_iconv_utf8_locale(name);
	#endif /* _WIN32_WCE */
	SDL_Appstyle = style;
	SDL_Instance = hInst ? hInst : SDL_GetModuleHandle();
	}

	/* Register the application class */
	class.hCursor = NULL;
	class.hIcon = LoadImage(SDL_Instance, SDL_Appname,
	IMAGE_ICON,
	0, 0, LR_DEFAULTCOLOR);
	class.lpszMenuName = NULL;
	class.lpszClassName = SDL_Appname;
	class.hbrBackground = NULL;
	class.hInstance = SDL_Instance;
	class.style = SDL_Appstyle;
	#if SDL_VIDEO_OPENGL
	class.style \|= CS_OWNDC;
	#endif
	class.lpfnWndProc = WinMessage;
	class.cbWndExtra = 0;
	class.cbClsExtra = 0;
	if ( ! RegisterClass(&class) ) {
	SDL_SetError("Couldn't register application class");
	return(-1);
	}

	#ifdef WM_MOUSELEAVE
	/* Get the version of TrackMouseEvent() we use */
	_TrackMouseEvent = NULL;
	handle = GetModuleHandle("USER32.DLL");
	if ( handle ) {
	_TrackMouseEvent = (BOOL (WINAPI )(TRACKMOUSEEVENT ))GetProcAddress(handle, "TrackMouseEvent");
	}
	if ( _TrackMouseEvent == NULL ) {
	_TrackMouseEvent = WIN_TrackMouseEvent;
	}
	#endif /* WM_MOUSELEAVE */

	#ifndef NO_GETKEYBOARDSTATE
	/* Initialise variables for SDL_ToUnicode() */
	codepage = GetCodePage();
	SDL_ToUnicode = Is9xME() ? ToUnicode9xME : ToUnicode;
	#endif

	app_registered = 1;
	return(0);
	}

	/* Unregisters the windowclass registered in SDL_RegisterApp above. */
	void SDL_UnregisterApp()
	{
	WNDCLASS class;

	/* SDL_RegisterApp might not have been called before */
	if ( !app_registered ) {
	return;
	}
	--app_registered;
	if ( app_registered == 0 ) {
	/* Check for any registered window classes. */
	if ( GetClassInfo(SDL_Instance, SDL_Appname, &class) ) {
	UnregisterClass(SDL_Appname, SDL_Instance);
	}
	SDL_free(SDL_Appname);
	SDL_Appname = NULL;
	}
	}

	#ifndef NO_GETKEYBOARDSTATE
	/* JFP: Implementation of ToUnicode() that works on 9x/ME/2K/XP */

	static int Is9xME()
	{
	OSVERSIONINFO info;

	SDL_memset(&info, 0, sizeof(info));
	info.dwOSVersionInfoSize = sizeof(info);
	if (!GetVersionEx(&info)) {
	return 0;
	}
	return (info.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS);
	}

	static int GetCodePage()
	{
	char buff[8];
	int lcid = MAKELCID(LOWORD(GetKeyboardLayout(0)), SORT_DEFAULT);
	int cp = GetACP();

	if (GetLocaleInfo(lcid, LOCALE_IDEFAULTANSICODEPAGE, buff, sizeof(buff))) {
	cp = SDL_atoi(buff);
	}
	return cp;
	}

	static int WINAPI ToUnicode9xME(UINT vkey, UINT scancode, PBYTE keystate, LPWSTR wchars, int wsize, UINT flags)
	{
	BYTE chars[2];

	if (ToAsciiEx(vkey, scancode, keystate, (WORD*)chars, 0, GetKeyboardLayout(0)) == 1) {
	return MultiByteToWideChar(codepage, 0, chars, 1, wchars, wsize);
	}
	return 0;
	}

	#endif /* !NO_GETKEYBOARDSTATE */