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op.dwCallback=NULL;
op.lpstrAlias=NULL;
op.lpstrDeviceType=_T("MPEGAudio");
CFileDialog dlg(TRUE);
if(IDOK==dlg.DoModal())
{
CString temp=dlg.GetPathName();
temp.Replace("\\","\\\\");
op.lpstrElementName=(LPCSTR)temp;
}
op.wDeviceID=0;
if(0!=mciSendCommand(0,MCI_OPEN,MCI_OPEN_ELEMENT,(DWORD)&op))
AfxMessageBox("打开失败!");