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The following code does not include the functions WinMain or WindowProc. See the sample code in Setting the Video Windowfor these functions.
#include <windows.h> #include
<streams.h> #define WM_GRAPHNOTIFY WM_APP + 1 #define
CLASSNAME "EventNotify" IGraphBuilder *pGraph = NULL; IMediaControl
*pMediaControl = NULL; IMediaEventEx *pEvent = NULL; HWND g_hwnd;
void PlayFile(void) { // Create the filter graph manager and render
the file. CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC,
IID_IGraphBuilder, (void **)&pGraph);
pGraph->RenderFile(L"C:\\Media\\Boys.avi", NULL); // Specify the
owner window. IVideoWindow *pVidWin = NULL;
pGraph->QueryInterface(IID_IVideoWindow, (void **)&pVidWin);
pVidWin->put_Owner((OAHWND)g_hwnd); pVidWin->put_WindowStyle(
WS_CHILD | WS_CLIPSIBLINGS); // Set the owner window to receive
event notices. pGraph->QueryInterface(IID_IMediaEventEx, (void
**)&pEvent); pEvent->SetNotifyWindow((OAHWND)g_hwnd,
WM_GRAPHNOTIFY, 0); // Run the graph.
pGraph->QueryInterface(IID_IMediaControl, (void
**)&pMediaControl); pMediaControl->Run(); } void
CleanUp(void) { IVideoWindow *pVidWin = NULL;
pGraph->QueryInterface(IID_IVideoWindow, (void **)&pVidWin);
pVidWin->put_Visible(OAFALSE); pVidWin->put_Owner(NULL); //
Stop the graph. pMediaControl->Stop(); long evCode;
pEvent->WaitForCompletion(INFINITE, &evCode);
pMediaControl->Release(); pEvent->Release();
pGraph->Release(); PostQuitMessage(0); } void HandleEvent() {
long evCode, param1, param2; HRESULT hr; while (hr =
pEvent->GetEvent(&evCode, ¶m1, ¶m2, 0),
SUCCEEDED(hr)) { hr = pEvent->FreeEventParams(evCode, param1,
param2); if ((EC_COMPLETE == evCode) || (EC_USERABORT == evCode)) {
CleanUp(); break; } } } /* WindowProc goes here. Add the following
case statement: case WM_GRAPHNOTIFY: HandleEvent(); break; */ //
WinMain goes here.
Last updated on Tuesday, May 18, 2004