试用

void CShow1Dlg::OnButton1() {// COM库初始化CoInitialize(NULL);// 创建组件对象 Graph(图表，可理解为一个Filter链表)IGraphBuilder *pGraph; CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&pGraph); // 查询得到组件对象上的接口IMediaControl *pMediaControl; pGraph->QueryInterface(IID_IMediaControl, (void **)&pMediaControl); IMediaEvent *pEvent; pGraph->QueryInterface(IID_IMediaEvent, (void **)&pEvent); // 创建 Graph 从一个硬盘文件pGraph->RenderFile(L"d://kk4.mpg", NULL); // 调用接口方法 运行图表 pMediaControl->Run(); // 调用接口方法 等待图表结束 long evCode; pEvent->WaitForCompletion(INFINITE, &evCode); // 释放调用的对象及其接口pMediaControl->Release(); pEvent->Release(); pGraph->Release();// 释放COM库所使用的资源CoUninitialize();}