midiConnect function

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.

Syntax

MMRESULT midiConnect(
  HMIDI    hmi,
  HMIDIOUT hmo,
  LPVOID   pReserved
);

Parameters

hmi

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 Value

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

Return code 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

   
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header mmeapi.h (include Windows.h)
Library Winmm.lib
DLL Winmm.dll

See Also

MIDI Functions