This message is sent to a window when an invalid MIDI system-exclusive message is received.
WORD wParam
Specifies a handle to the MIDI input device that received the invalid message.
LONG lParam
Specifies a far pointer to a MIDIHDR structure identifying buffer containing the invalid message.
None
The returned buffer may not be full. The dwBytesRecorded field of the MIDIHDR structure specified by lParam will specify the number of bytes recorded into the buffer.
MIM_LONGERROR