Sent to a MIDI output driver to request the capabilities of a specific MIDI output device.
MMSYSERR_NOTENABLED | The driver failed to load or initialize. |
For non-Plug and Play drivers, specifies a far pointer to a MIDIOUTCAPS data structure. The driver fills this structure with the capabilities of the device.
For non-Plug and Play drivers, specifies the size of the MIDIOUTCAPS structure in bytes.
For non-Plug and Play drivers, the driver should only write dwParam2 or less bytes to the location pointed to by dwParam1.