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MOM_OPEN function

  • Article

WINMM sends the MOM_OPEN message to the modMessage function of a MIDI output driver.

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 MOM_OPEN when it calls modMessage to process this message.

  • dwUser
    The driver sets this parameter to match the instance data from the client that called it.

  • dwParam1
    Not used.

  • dwParam2
    Not used.

Return value

None

Remarks

Requirements

Target platform

 Desktop

Version

Available in Windows XP and later Windows operating systems.

Header

 Mmddk.h (include Mmddk.h, Mmsystem.h, or Windows.h)