mixerMessage

	Overview

	Group

	Quick Info

The mixerMessage function sends a custom mixer driver message directly to a mixer driver.

DWORD mixerMessage(

HMIXER hmx,
UINT uMsg,
DWORD dwParam1,
DWORD dwParam2
);

Parameters
hmx

Handle of an open instance of a mixer device. This handle is returned by the mixerOpen function.

uMsg

Custom mixer driver message to send to the mixer driver. This message must be above or equal to the MXDM_USER constant.

dwParam1 and dwParam2

Arguments associated with the message being sent.

Return Values
Returns a value that is specific to the custom mixer driver message. Possible error values include the following:

MMSYSERR_INVALHANDLE	The specified device handle is invalid.
MMSYSERR_INVALPARAM	The uMsg parameter specified in the MXDM_USER message is invalid.
MMSYSERR_NOTSUPPORTED	The mixer device did not process the message.

Remarks
User-defined messages must be sent only to a mixer driver that supports the messages. The application should verify that the mixer driver is the driver that supports the message by retrieving the mixer capabilities and checking the wMid, wPid, vDriverVersion, and szPname members of the MIXERCAPS structure.