See also MIM_LONGERROR
Sent by a MIDI input driver to a client application when an invalid MIDI event is received.
DWORD dwParam1
Specifies the invalid MIDI data that was received. The message is packed into a DWORD with the first byte of the message in the low-order byte. Unused bytes should be set to zero.
DWORD dwParam2
Specifies the time that the message was received by the input device driver. The time stamp is specified in milliseconds, beginning at zero when the driver received the MIDM_START message.