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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 to 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 to 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.
| Value | Description | |
| 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).
Requirements
** Windows NT/2000/XP:** Included in Windows NT 3.1 and later.
** Windows 95/98/Me:** Included in Windows 95 and later.
** Header:** Declared in Mmsystem.h; include Windows.h.
** Library:** Use Winmm.lib.
See Also
Musical Instrument Digital Interface (MIDI), MIDI Functions, midiOutOpen, MIM_DATA