Quick Info


The MM_MIM_DATA message is sent to a window when a complete MIDI message is received by a MIDI input device.


wParam = (WPARAM) hInput

lParam = (LPARAM) (DWORD) lMidiMessage



Handle of the MIDI input device that received the MIDI message.


MIDI message that was received. The message is packed into a doubleword value as follows:

High word
High-order byte
Not used.

Low-order byte
Contains a second byte of MIDI data (when needed).
Low word
High-order byte
Contains the first byte of MIDI data (when needed).

Low-order byte
Contains the MIDI status.

The two MIDI data bytes are optional, depending on the MIDI status byte.

Return Values

This message does not return a value.


MIDI messages received from a MIDI input port have running status disabled; each message is expanded to include the MIDI status byte.

This message is not sent when a MIDI system-exclusive message is received. No time stamp is available with this message. For time-stamped input data, you must use the messages that are sent to callback functions.

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