enum PLAYSTATE {Stopped, Paused, Running, Init};
PLAYSTATE g_Current=Init;
HWND ghApp;
HINSTANCE ghInst;
HRESULT hr;
LONG evCode;
LONG evParam1;
LONG evParam2;
//HRESULT hr;
IGraphBuilder *pigb = NULL;
IMediaControl *pimc = NULL;
IMediaEventEx *pimex = NULL;
IVideoWindow *pivw = NULL;
IMediaSeeking *pims = NULL;
void CTestDlg::OnPlay()
{