哎，关于MCI的问题

void CTestPayerDlg::OnPlayerstart()
{
    // TODO: Add your control notification handler code here
    MessageBox("您现在点击的是播放!");
    UINT wDeviceID;
    DWORD dwReturn;
    MCI_OPEN_PARMS mciOpenParms;
    mciOpenParms.wDeviceID =0;
    mciOpenParms.lpstrDeviceType=(LPCSTR) MCI_DEVTYPE_WAVEFORM_AUDIO;
    mciOpenParms.lpstrElementName= (LPCSTR) "C:\Documents and Settings\GWOLF18\桌面\垃圾\TestPayer\2.wav";
    if(dwReturn=(mciSendCommand(NULL,MCI_OPEN,MCI_WAIT | MCI_OPEN_TYPE |
MCI_OPEN_TYPE_ID | MCI_OPEN_ELEMENT,(DWORD)(LPVOID) &mciOpenParms)))
    {
        MessageBox("打开失败！");
    }
    MCI_PLAY_PARMS PlayParms;
    PlayParms.dwFrom=0;
    mciSendCommand (wDeviceID, MCI_PLAY,
    MCI_FROM, (DWORD)(LPVOID)
     &PlayParms);


    /*wDeviceID=mciOpenParms.wDeviceID;
    mciSendCommand(wDeviceID,MCI_PLAY,MCI_OPEN_TYPE,(DWORD)(LPVOID) &mciOpenParms);*/

   
}
做了一个映射，怎么改都打不开音乐文件，就是点一个播发按钮就会播放音乐，可我不过怎么改这段代码都不行，其他代码都是MFC的一个对话框的代码，就不传了。希望有人帮我改改啊