作成したウインドウ上で動画再生

ウインドウの作成:win32　の記事で作ったウインドウに
msdnのサンプルコードを実行してみる　で作ったソースを追加

IVideoWindow インターフェイス

ウインドウ作成時に動画を再生するようにする。

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// GT_HelloWorldWin32.cpp // compile with: /D_UNICODE /DUNICODE /DWIN32 /D_WINDOWS /c   #include <windows.h> #include <stdlib.h> #include <string.h> #include <tchar.h>   #include <dshow.h>   // Global variables   // The main window class name. static TCHAR szWindowClass[] = _T("win32app");   // The string that appears in the application's title bar. static TCHAR szTitle[] = _T("Win32 Guided Tour Application");   HINSTANCE hInst;   // Forward declarations of functions included in this code module: LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);   int WINAPI WinMain(HINSTANCE hInstance,  HINSTANCE hPrevInstance,  LPSTR lpCmdLine,  int nCmdShow) {  WNDCLASSEX wcex;    wcex.cbSize = sizeof(WNDCLASSEX);  wcex.style          = CS_HREDRAW | CS_VREDRAW;  wcex.lpfnWndProc    = WndProc;  wcex.cbClsExtra     = 0;  wcex.cbWndExtra     = 0;  wcex.hInstance      = hInstance;  wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));  wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);  wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);  wcex.lpszMenuName   = NULL;  wcex.lpszClassName  = szWindowClass;  wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));    if (!RegisterClassEx(&wcex))  {   MessageBox(NULL,    _T("Call to RegisterClassEx failed!"),    _T("Win32 Guided Tour"),    NULL);     return 1;  }    hInst = hInstance; // Store instance handle in our global variable    // The parameters to CreateWindow explained:  // szWindowClass: the name of the application  // szTitle: the text that appears in the title bar  // WS_OVERLAPPEDWINDOW: the type of window to create  // CW_USEDEFAULT, CW_USEDEFAULT: initial position (x, y)  // 500, 100: initial size (width, length)  // NULL: the parent of this window  // NULL: this application does not have a menu bar  // hInstance: the first parameter from WinMain  // NULL: not used in this application  HWND hWnd = CreateWindow(   szWindowClass,   szTitle,   WS_OVERLAPPEDWINDOW,   CW_USEDEFAULT, CW_USEDEFAULT,   500, 400,   NULL,   NULL,   hInstance,   NULL   );    if (!hWnd)  {   MessageBox(NULL,    _T("Call to CreateWindow failed!"),    _T("Win32 Guided Tour"),    NULL);     return 1;  }    // The parameters to ShowWindow explained:  // hWnd: the value returned from CreateWindow  // nCmdShow: the fourth parameter from WinMain  ShowWindow(hWnd,   nCmdShow);  UpdateWindow(hWnd);    // Main message loop:  MSG msg;  while (GetMessage(&msg, NULL, 0, 0))  {   TranslateMessage(&msg);   DispatchMessage(&msg);  }    return (int) msg.wParam; }   // //  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM) // //  PURPOSE:  Processes messages for the main window. // //  WM_PAINT    - Paint the main window //  WM_DESTROY  - post a quit message and return // // LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {  PAINTSTRUCT ps;  HDC hdc;  TCHAR greeting[] = _T("Hello, World!");    IGraphBuilder *pGraph = NULL;  IMediaControl *pControl = NULL;  IMediaEvent   *pEvent = NULL;  IVideoWindow  *pVideoWindow = NULL;    HRESULT hr = CoInitialize(NULL);// COM ライブラリを初期化する。    switch (message)  {  case WM_CREATE://ウインドウ作成時の処理     // フィルタ グラフ マネージャを作成し、インターフェイスを問い合わせる。   hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER,    IID_IGraphBuilder, (void **)&pGraph);   if (FAILED(hr))   {    printf("ERROR - Could not create the Filter Graph Manager.");        }     hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl);   hr = pGraph->QueryInterface(IID_IMediaEvent, (void **)&pEvent);     hr = pGraph->QueryInterface(IID_IVideoWindow, (LPVOID*)&pVideoWindow);       // グラフを作成する。 重要 : この文字列をシステム上のファイルに置き換える。   hr = pGraph->RenderFile(L"E:\\sampleMovie\\avi_divx5_mp3.avi", NULL);     // 描画先ウィンドウの設定   hr = pVideoWindow->put_Owner((OAHWND)hWnd);   hr = pVideoWindow->put_WindowStyle(WS_CHILD|WS_CLIPSIBLINGS);   hr = pVideoWindow->put_Visible(OATRUE);     // グラフを実行する。   hr = pControl->Run();     // 描画先ウィンドウ内の描画位置の設定   pVideoWindow->SetWindowPosition(0, 0, 320, 240);     pVideoWindow->Release();   pControl->Release();   pEvent->Release();   pGraph->Release();   CoUninitialize();     break;  case WM_PAINT:   hdc = BeginPaint(hWnd, &ps);     // Here your application is laid out.   // For this introduction, we just print out "Hello, World!"   // in the top left corner.   //TextOut(hdc,5, 5,greeting, _tcslen(greeting));   // End application-specific layout section.     EndPaint(hWnd, &ps);   break;  case WM_DESTROY:   PostQuitMessage(0);   break;  default:   return DefWindowProc(hWnd, message, wParam, lParam);   break;  }    return 0; }