DRVM_IOCTL

See also DRVM_ADD_THRU, DRVM_IOCTL_DATA, DRVM_REMOVE_THRU

Sent to a MIDI throughput device driver with information the driver uses to filter MIDI throughput data. This message is sent to a device driver when an application calls the midiOutMessage function.

• The return value is driver dependent.

DWORD dwParam1

Specifies the handle of the MIDI output device to which configuration information is intended to apply. This parameter may be NULL.

DWORD dwParam2

NULL or the address of a DRVM_IOCTL_DATA structure. (If this parameter is not zero, it is translated by the thunking layer as a pointer.) The meaning of the contents of this structure is driver-dependent.