MODM_RESTART function

WINMM sends the MODM_RESTART message to the modMessage function of a MIDI output driver to restart playback after a MODM_PAUSE.

Syntax

DWORD modMessage(
   UINT      uDeviceID,
   UINT      uMsg,
   DWORD_PTR dwUser,
   DWORD_PTR dwParam1,
   DWORD_PTR dwParam2
);

Parameters

• uDeviceID
  Specifies the ID of the target device. Device IDs are sequential and have an initial value of zero and a final value that is equal to one less than the number of devices that the driver supports.

• uMsg
  WINMM sets this parameter to MODM_RESTART when it calls modMessage to process this message.

• dwUser
  Use this parameter to return instance data to the driver. Drivers that support multiple clients can use this instance data to track the client that is associated with the message.

• dwParam1
  Not used.

• dwParam2
  Not used.

Return value

The modMessage function returns MMSYSERR_NOERROR if the operation is successful. Otherwise, it returns MMSYSERR_NOTENABLED to indicate that the driver failed to load or initialize.

Remarks

The MIDI output device driver must restart MIDI playback at the current position.

MODM_PAUSE and MODM_RESTART message pairs cannot be nested. MODM_PAUSE messages that are received while the driver is already in the paused state must be ignored; playback will start on the first MODM_RESTART message that is received regardless of the number of MODM_PAUSE that messages were received. Likewise, MODM_RESTART messages that are received while the driver is already in play mode must be ignored. MMSYSERR_NOERROR must be returned in either case.

Requirements

See also

modMessage

MODM_PAUSE