BSTR szfile = filepath.AllocSysString(); /* CString 轉 BSTR */ 
CoInitialize(NULL); /*初始化 COM 元件 */
CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&pGraph); /*建立 Instance */ pGraph ->QueryInterface(IID_IMediaControl, (void **)&pMediaControl);
pGraph ->QueryInterface(IID_IMediaEvent, (void **)&pEvent);
pGraph ->QueryInterface(IID_IVideoWindow,(LPVOID *)&pVideoWindow);
pGraph ->RenderFile(szfile , NULL); pVideoWindow ->put_Caption(L" Wa HaHa ^^ "); /* WaHaHa ^^" */
pMediaControl ->Run() /* 播放 */
long evCode;
pEvent ->WaitForCompletion(-1, &evCode); /* 播放到完 */

上面是我找到的程式
請問一下要怎麼修改才能讓
stop有用阿
像這樣寫會一直播到完

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