The MXDM_GETCONTROLDETAILS message requests a user-mode mixer driver to return detailed information about the specified control on the specified audio line.
The driver should return MMSYSERR_NOERROR if the operation succeeds. Otherwise it should return one of the MMSYSERR or MIXERR error codes defined in mmsystem.h. See mixerGetControlDetails return values in the Win32 SDK.
A client sends the MXDM_GETCONTROLDETAILS message by calling the user-mode driver’s mxdMessage entry point, passing the specified parameters.
The driver receives an empty MIXERCONTROLDETAILS structure and fills it in.