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midiConnect

The midiConnect function connects a MIDI input device to a MIDI thru or output device, or connects a MIDI thru device to a MIDI output device.

MMRESULT midiConnect(

HMIDI hMidi,

HMIDIOUT hmo,

LPVOID pReserved

);

Parameters

hMidi

Handle of a MIDI input device or a MIDI thru device. (For thru devices, this handle must have been returned by a call to the midiOutOpen function.)

hmo

Handle of the MIDI output or thru device.

pReserved

Reserved; must be NULL.

Return Values

Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following:

MIDIERR_NOTREADY
Specified input device is already connected to an output device.
MMSYSERR_INVALHANDLE
Specified device handle is invalid.

Remarks

After calling this function, the MIDI input device receives event data in an MIM_DATA message whenever a message with the same event data is sent to the output device driver.

A thru driver is a special form of MIDI output driver. The system will allow only one MIDI output device to be connected to a MIDI input device, but multiple MIDI output devices can be connected to a MIDI thru device. Whenever the given MIDI input device receives event data in an MIM_DATA message, a message with the same event data is sent to the given output device driver (or through the thru driver to the output drivers).

See Also

midiOutOpen
, MIM_DATA


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