function starts MIDI input on the specified MIDI input device.
Handle of the MIDI input device.
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error
values include the following:
||The specified device handle is invalid.
This function resets the time stamp to zero; time stamp values for
subsequently received messages are relative to the time that this function was called.
All messages except system-exclusive messages are sent directly to the client
when they are received. System-exclusive messages are placed in the buffers
supplied by the midiInAddBuffer
function. If there are no buffers in the queue, the system-exclusive data is
thrown away without notification to the client and input continues. Buffers are
returned to the client when they are full, when a complete system-exclusive
message has been received, or when the midiInReset
function is used. The dwBytesRecorded
member of the MIDIHDR
structure will contain the actual length of data received.
Calling this function when input is already started has no effect, and the
function returns zero.
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