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Verifying the Output Device
After opening the sequencer, you should check whether the MIDI mapper was
available and selected as the output device. The following example uses the MCI_STATUS command to verify that the MIDI mapper is the output device for the MCI
sequencer.
UINT wDeviceID; // valid MCI sequencer ID
DWORD dwReturn;
MCI_STATUS_PARMS mciStatusParms;
// Make sure the opened device is the MIDI mapper.
mciStatusParms.dwItem = MCI_SEQ_STATUS_PORT;
if (dwReturn = mciSendCommand(wDeviceID, MCI_STATUS, MCI_STATUS_ITEM,
(DWORD)(LPVOID) &mciStatusParms))
{
// Error sending MCI_STATUS command.
return;
}
if (LOWORD(mciStatusParms.dwReturn) == MIDI_MAPPER)
// The MIDI mapper is the output device.
Else
// The MIDI mapper is not the output device.
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