HOWTO: How to Address Multiple CDAudio Devices in Windows NT

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MCI solves the problem of how to control a particular CDAudio device. All you need to do is open the CDAudio device, specifying the drive letter of the CD-ROM drive to be used as the element to open. The MCI string syntax to do this is as follows:

   open d: type cdaudio alias cd
				

In this case, the CD-ROM drive is drive D:

The following code fragment demonstrates the equivalent MCI command syntax code:

    MCI_OPEN_PARMS  mciOpen;
    TCHAR           szElementName[4];
    TCHAR           szAliasName[32];
    DWORD           dwFlags;
    DWORD           dwAliasCount = GetCurrentTime();
    DWORD           dwRet;
    TCHAR           chDrive;

    chDrive = TEXT('D'); // Use drive D

    ZeroMemory( &mciOpen, sizeof(mciOpen) );
    mciOpen.lpstrDeviceType = (LPTSTR)MCI_DEVTYPE_CD_AUDIO;
    wsprintf( szElementName, TEXT("%c:"), chDrive );
    wsprintf( szAliasName, TEXT("CD%lu:"), dwAliasCount );

    mciOpen.lpstrElementName = szElementName;
    mciOpen.lpstrAlias = szAliasName;

    dwFlags = MCI_OPEN_ELEMENT | MCI_OPEN_SHAREABLE | MCI_OPEN_ALIAS |
              MCI_OPEN_TYPE | MCI_OPEN_TYPE_ID | MCI_WAIT;

    dwRet = mciSendCommand(0, MCI_OPEN, dwFlags, (DWORD)(LPVOID)&mciOpen);

    if ( dwRet == MMSYSERR_NOERROR ) {

        // The device was opened successfully

    }
    else {

        // The device was not opened successfully

    }