自学教程：C++ GetMessage函数代码示例

// для GCC - другаяint main()#endif{	w = ImageWidth, h = ImageHeight;	encode_start();	//memset(&CamImg, 0, sizeof(CamImg));				MSG msg;	WNDCLASSA wcl;	// 0. Регистрируем оконный класс	wcl.hInstance = NULL;	wcl.lpszClassName = szWinName;	wcl.lpfnWndProc = MyFunc;	wcl.style = 0;	wcl.hIcon = LoadIcon(NULL, IDI_APPLICATION);	wcl.hCursor = LoadCursor(NULL, IDC_ARROW);	wcl.lpszMenuName = NULL;	wcl.cbClsExtra = 0;	wcl.cbWndExtra = 0;	wcl.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);	if(!RegisterClassA(&wcl)) return 0;	// 1. Создаём окно	hWnd = CreateWindowA(szWinName, "Video", 		WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 1024, 700, HWND_DESKTOP, NULL, 		NULL, NULL);	HWND hStartRecord = CreateWindowA(									"BUTTON", // Window class									"Start", // Title									WS_TABSTOP | WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON,									650,									200,									100,									50,									hWnd,									(HMENU)ID_START_BUTTON, // для WM_COMMAND									NULL /*hThisInst*/,									NULL								);		HWND hStopRecord = CreateWindowA(									"BUTTON", // Window class									"Stop", // Title									WS_TABSTOP | WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON,									650,									100,									100,									50,									hWnd,									(HMENU)ID_STOP_BUTTON, // для WM_COMMAND									NULL /*hThisInst*/,									NULL								);		// 2. Отображаем окно на экран	ShowWindow(hWnd, SW_SHOW);	UpdateWindow(hWnd);	// 3. Запускаем таймер (20 мсек, 50 кадров в секунду)	SetTimer(hWnd, 1, 20, NULL);	// 4. стартуем получение кадров с камеры	InitVideo();	// 5. Стандартный цикл обработки событий	while(GetMessage(&msg, NULL, 0, 0))	{		TranslateMessage(&msg);		DispatchMessage(&msg);	}	return msg.wParam;}

//.........这里部分代码省略.........			char *st = strstr( lpCmdLine, "|" ) ;			if( st!=NULL ) {				SavFile=(char*)malloc(strlen(st)+1);				strcpy( SavFile, st+1 ) ;				st[0]='/0';				IniFile=(char*)malloc(strlen(lpCmdLine)+1);				strcpy( IniFile, lpCmdLine ) ;			}		}	}	TestIfParentIsKiTTY() ;#endif		notepad_hinst = hinstance; 	HANDLE hAccel = LoadAccelerators (notepad_hinst, MAKEINTRESOURCE(NOTEPAD_IDR_ACCEL)) ;	wc.style = 0;	wc.lpfnWndProc = Notepad_WndProc;	wc.cbClsExtra = 0;	wc.cbWndExtra = 0;	wc.hInstance = NULL;	//wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);	wc.hIcon = LoadIcon(notepad_hinst, MAKEINTRESOURCE(NOTEPAD_IDI_MAINICON));	wc.hCursor = LoadCursor(NULL, IDC_ARROW);	wc.hbrBackground = (HBRUSH)(1 + COLOR_BTNFACE);	wc.lpszMenuName =  NULL;	wc.lpszClassName = Notepad_szprogname ;	if(!RegisterClass(&wc)) return FALSE;	//menu et sous menu	hSMApropos = CreateMenu();	AppendMenu(hSMApropos, MF_STRING, NOTEPAD_IDM_ABOUT, Notepad_LoadString(NOTEPAD_STR_ABOUT));	hSMEdition = CreateMenu();	AppendMenu(hSMEdition, MF_STRING, NOTEPAD_IDM_CUT, Notepad_LoadString(NOTEPAD_STR_CUT));	AppendMenu(hSMEdition, MF_STRING, NOTEPAD_IDM_COPY, Notepad_LoadString(NOTEPAD_STR_COPY));	AppendMenu(hSMEdition, MF_STRING, NOTEPAD_IDM_PASTE, Notepad_LoadString(NOTEPAD_STR_PASTE));	AppendMenu(hSMEdition, MF_STRING, NOTEPAD_IDM_SELECTALL, Notepad_LoadString(NOTEPAD_STR_SELECTALL));	AppendMenu(hSMEdition, MF_STRING, NOTEPAD_IDM_UNDO, Notepad_LoadString(NOTEPAD_STR_UNDO));	AppendMenu(hSMEdition, MF_SEPARATOR, 0, NULL );	AppendMenu(hSMEdition, MF_STRING, NOTEPAD_IDM_SETFONT, Notepad_LoadString(NOTEPAD_STR_SETFONT));	hSMFichier = CreateMenu();	AppendMenu(hSMFichier, MF_STRING, NOTEPAD_IDM_NEW, Notepad_LoadString(NOTEPAD_STR_NEW));	AppendMenu(hSMFichier, MF_STRING, NOTEPAD_IDM_OPEN, Notepad_LoadString(NOTEPAD_STR_OPEN));	AppendMenu(hSMFichier, MF_STRING|MF_GRAYED|MF_DISABLED, NOTEPAD_IDM_SAVE, Notepad_LoadString(NOTEPAD_STR_SAVE));	AppendMenu(hSMFichier, MF_STRING, NOTEPAD_IDM_SAVEAS, Notepad_LoadString(NOTEPAD_STR_SAVEAS));#ifdef NOMAIN	AppendMenu(hSMFichier, MF_SEPARATOR, 0, NULL );	AppendMenu(hSMFichier, MF_STRING, NOTEPAD_IDM_LOAD_INI, TEXT("ini file"));	AppendMenu(hSMFichier, MF_STRING, NOTEPAD_IDM_LOAD_SAV, TEXT("sav file"));	if( ParentWindow!=NULL ) {		AppendMenu(hSMFichier, MF_SEPARATOR, 0, NULL );		AppendMenu(hSMFichier, MF_STRING, NOTEPAD_IDM_RESIZE, TEXT("&Resize"));		}#endif	AppendMenu(hSMFichier, MF_SEPARATOR, 0, NULL );	AppendMenu(hSMFichier, MF_STRING, NOTEPAD_IDM_QUIT, Notepad_LoadString(NOTEPAD_STR_QUIT));	hMenu = CreateMenu();	AppendMenu(hMenu,MF_POPUP,(UINT)hSMFichier,Notepad_LoadString(NOTEPAD_STR_FILE));	AppendMenu(hMenu,MF_POPUP,(UINT)hSMEdition,Notepad_LoadString(NOTEPAD_STR_EDIT));#ifdef NOMAIN	HMENU hSMDelim = CreateMenu() ;	AppendMenu(hSMDelim, MF_STRING|MF_CHECKED, NOTEPAD_IDM_CRLF, Notepad_LoadString(NOTEPAD_STR_CRLF));	AppendMenu(hSMDelim, MF_STRING|MF_CHECKED, NOTEPAD_IDM_SCOLON, Notepad_LoadString(NOTEPAD_STR_SCOLON));	AppendMenu(hSMDelim, MF_STRING|MF_UNCHECKED, NOTEPAD_IDM_SLASH, Notepad_LoadString(NOTEPAD_STR_SLASH));	AppendMenu(hMenu,MF_POPUP,(UINT)hSMDelim,Notepad_LoadString(NOTEPAD_STR_DELIM));	AppendMenu(hMenu,MF_STRING, NOTEPAD_IDM_SEND, Notepad_LoadString(NOTEPAD_STR_SEND));#endif	AppendMenu(hMenu,MF_POPUP,(UINT)hSMApropos,Notepad_LoadString(NOTEPAD_STR_HELP));	//hwnd = CreateWindow(Notepad_szprogname, Notepad_szprogname, WS_OVERLAPPEDWINDOW,CW_USEDEFAULT, CW_USEDEFAULT, cxScreen, cyScreen, NULL, hMenu, hinstance, NULL);	hwnd = CreateWindowEx(WS_EX_ACCEPTFILES,Notepad_szprogname, Notepad_szprogname, WS_OVERLAPPEDWINDOW,CW_USEDEFAULT, CW_USEDEFAULT, cxScreen, cyScreen, NULL, hMenu, hinstance, NULL);		if (!hwnd) return FALSE;	ShowWindow(hwnd, nCmdShow) ;	UpdateWindow(hwnd) ;#ifdef NOMAIN	InitKiTTYNotepad( hwnd ) ;	if( strstr( lpCmdLine, "-ed " ) == lpCmdLine )		if( strlen(lpCmdLine)>4 )		SendMessage( hwnd, WM_COMMAND, NOTEPAD_IDM_LOAD, (LPARAM)(lpCmdLine+4) ) ;#else	if( strlen(lpCmdLine)>0 )		SendMessage( hwnd, WM_COMMAND, NOTEPAD_IDM_LOAD, (LPARAM)lpCmdLine ) ;#endif		while (GetMessage(&msg, NULL, 0, 0)) {		if(!TranslateAccelerator(hwnd, hAccel, &msg)){			TranslateMessage(&msg);			DispatchMessage(&msg);			}		}	return msg.wParam;	}

//int WINAPIvoid    pvm_win_window_thread(){    MSG Message;    if(pvm_win_setup_window())    {        init_err = 1;        printf("pvm_win_setup_window failed/n");        return;    }    // Allocate enough memory for the BITMAPINFOHEADER and 256 RGBQUAD palette entries    LPBITMAPINFO lpbi;    lpbi = (LPBITMAPINFO) malloc(sizeof(BITMAPINFOHEADER) + (256 * sizeof(RGBQUAD)));    lpbi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);    lpbi->bmiHeader.biWidth = VSCREEN_WIDTH;    lpbi->bmiHeader.biHeight = VSCREEN_HEIGHT;    lpbi->bmiHeader.biPlanes = 1;    lpbi->bmiHeader.biBitCount = 24;    lpbi->bmiHeader.biCompression = BI_RGB;    lpbi->bmiHeader.biSizeImage = 0;    lpbi->bmiHeader.biXPelsPerMeter = 0;    lpbi->bmiHeader.biYPelsPerMeter = 0;    lpbi->bmiHeader.biClrUsed = 0;    lpbi->bmiHeader.biClrImportant = 0;    HDC hScreenDC = GetWindowDC(NULL);    screenBitmap = CreateDIBSection( hScreenDC, lpbi, DIB_RGB_COLORS, (void*)&screen_image, 0, 0);    // Assume hPaintDC is a variable of type HDC, and the dc we're rendering to    //hBitmapDC = CreateCompatibleDC(hScreenDC);    //HBITMAP hOldBitmap = (HBITMAP)SelectObject(hBitmapDC, screenBitmap);    ReleaseDC(NULL,hScreenDC);    free(lpbi);    int i;    for( i = 0; i < VSCREEN_WIDTH * VSCREEN_HEIGHT * 3; i++)    {        screen_image[i] = 34;    }    drv_video_win32.screen = screen_image;    drv_video_win32.xsize = VSCREEN_WIDTH;    drv_video_win32.ysize = VSCREEN_HEIGHT;    drv_video_win32.update = &drv_win_screen_update;#if 1    drv_video_win32.bitblt = &vid_bitblt_forw;    drv_video_win32.winblt = &vid_win_winblt;    drv_video_win32.readblt = &vid_readblt_forw;    drv_video_win32.bitblt_part = &vid_bitblt_part_forw;#else    drv_video_win32.bitblt = &drv_video_bitblt_rev;    drv_video_win32.winblt = &drv_video_win_winblt_rev;    drv_video_win32.readblt = &drv_video_readblt_rev;    drv_video_win32.bitblt_part = &drv_video_bitblt_part_rev;#endif    drv_video_win32.mouse_redraw_cursor = &vid_mouse_draw_deflt;    drv_video_win32.mouse_set_cursor = &vid_mouse_set_cursor_deflt;    drv_video_win32.mouse_disable = &vid_mouse_off_deflt;    drv_video_win32.mouse_enable = &vid_mouse_on_deflt;    init_ok = 1;#if HOVER    {        eventTrack.cbSize = sizeof(eventTrack);        eventTrack.dwFlags = TME_HOVER;        eventTrack.hwndTrack = hWnd;        eventTrack.dwHoverTime = 5;        if(0 == TrackMouseEvent(&eventTrack))            printf("Track error/n");    }#endif    while(GetMessage(&Message, hWnd, 0, 0))    {        TranslateMessage(&Message);        DispatchMessage(&Message);    }    //return Message.wParam;    //printf("Message loop end/n");}

/* This function checks the windows message queue and DirectInput and returns   1 if there was input, 0 if there was no input, or -1 if the application has   posted a quit message.*/static int DX5_CheckInput(_THIS, int timeout, BOOL processInput){	MSG msg;	int      i;	HRESULT  result;	DWORD    event;	/* Check the normal windows queue (highest preference) */	posted = 0;	while ( ! posted &&	        PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) ) {		if ( GetMessage(&msg, NULL, 0, 0) > 0 ) {			DispatchMessage(&msg);		} else {			return(-1);		}	}	if ( posted ) {		return(1);	}	/* Pump the DirectInput flow */	if ( SDL_GetAppState() & SDL_APPINPUTFOCUS ) {		for ( i=0; i<SDL_DIndev; ++i ) {			result = IDirectInputDevice2_Poll(SDL_DIdev[i]);			if ( (result == DIERR_INPUTLOST) ||					(result == DIERR_NOTACQUIRED) ) {				if ( strcmp(inputs[i].name, "mouse") == 0 ) {					mouse_lost = 1;				}				IDirectInputDevice2_Acquire(SDL_DIdev[i]);				IDirectInputDevice2_Poll(SDL_DIdev[i]);			}		}	}	/* Wait for messages and input events */	event = MsgWaitForMultipleObjects(SDL_DIndev, SDL_DIevt, FALSE,							timeout, QS_ALLEVENTS);	if ((event >= WAIT_OBJECT_0) && (event < (WAIT_OBJECT_0+SDL_DIndev))) {		DWORD numevents;		DIDEVICEOBJECTDATA evtbuf[INPUT_QSIZE];		event -= WAIT_OBJECT_0;		numevents = INPUT_QSIZE;		result = IDirectInputDevice2_GetDeviceData(				SDL_DIdev[event], sizeof(DIDEVICEOBJECTDATA),							evtbuf, &numevents, 0);		if ( (result == DIERR_INPUTLOST) ||					(result == DIERR_NOTACQUIRED) ) {			if ( strcmp(inputs[event].name, "mouse") == 0 ) {				mouse_lost = 1;			}			IDirectInputDevice2_Acquire(SDL_DIdev[event]);			result = IDirectInputDevice2_GetDeviceData(				SDL_DIdev[event], sizeof(DIDEVICEOBJECTDATA),							evtbuf, &numevents, 0);		}		/* Handle the events */		if ( result == DI_OK && processInput ) {			/* Note: This can post multiple events to event queue			 */			(*SDL_DIfun[event])((int)numevents, evtbuf);			return(1);		}	}	if ( event != WAIT_TIMEOUT ) {		/* Maybe there was a windows message? */		if ( PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) ) {			if ( GetMessage(&msg, NULL, 0, 0) > 0 ) {				DispatchMessage(&msg);			} else {				return(-1);			}			return(1);		}	}	return(0);}

int WINAPIwWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nShowCmd){    WCHAR szWindowClass[] = L"ROSAPPMGR";    HANDLE hMutex = NULL;    HACCEL KeyBrd;    MSG Msg;    InitializeAtlModule(hInstance, TRUE);    switch (GetUserDefaultUILanguage())    {        case MAKELANGID(LANG_HEBREW, SUBLANG_DEFAULT):            SetProcessDefaultLayout(LAYOUT_RTL);            break;        default:            break;    }    hInst = hInstance;    hMutex = CreateMutexW(NULL, FALSE, szWindowClass);    if ((!hMutex) || (GetLastError() == ERROR_ALREADY_EXISTS))    {        /* If already started, it is found its window */        HWND hWindow = FindWindowW(szWindowClass, NULL);        /* Activate window */        ShowWindow(hWindow, SW_SHOWNORMAL);        SetForegroundWindow(hWindow);        return 1;    }    if (!LoadSettings())    {        FillDefaultSettings(&SettingsInfo);    }    InitLogs();    InitCommonControls();    hMainWnd = CreateMainWindow();    if (!hMainWnd) goto Exit;    /* Maximize it if we must */    ShowWindow(hMainWnd, (SettingsInfo.bSaveWndPos && SettingsInfo.Maximized ? SW_MAXIMIZE : nShowCmd));    UpdateWindow(hMainWnd);    if (SettingsInfo.bUpdateAtStart)        UpdateAppsDB();    /* Load the menu hotkeys */    KeyBrd = LoadAccelerators(NULL, MAKEINTRESOURCE(HOTKEYS));    /* Message Loop */    while (GetMessage(&Msg, NULL, 0, 0))    {        if (!TranslateAccelerator(hMainWnd, KeyBrd, &Msg))        {            TranslateMessage(&Msg);            DispatchMessage(&Msg);        }    }Exit:    if (hMutex)        CloseHandle(hMutex);    InitializeAtlModule(hInstance, FALSE);    return 0;}

//----------------------------------------------------------------------------------////----------------------------------------------------------------------------------void MainLoop(){	for(;;)	{ 		MSG msg;		if (PeekMessage (&msg,NULL,0,0,PM_NOREMOVE)) 		{			if( msg.message == WM_QUIT )			{				return ;			}			GetMessage (&msg,NULL,0,0);			TranslateMessage(&msg);			DispatchMessage(&msg);		}		else		{			// フリップを行う			g_manager->Flip();			// Updateと再生
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