MXDM_GETLINECONTROLS (Compact 2013)
3/26/2014
This message requests a user-mode mixer driver to return information about specified controls connected to a specified audio line for the specified device.
Syntax
typedef struct {
DWORD uDeviceId;
UINT uMsg;
DWORD dwUser;
DWORD lParam1;
DWORD lParam2;
} MXDM_GETLINECONTROLS;
Members
- uDeviceId
Device identifier for the target device. It can be 0, 1, 2, and so on.
- uMsg
Equals MXDM_GETLINECONTROLS.
- dwUser
Instance identifier associated with the caller.
- lParam1
Pointer to a MIXERLINECONTROLS structure.
- lParam2
Contains flag values.
Return Value
Returns MMSYSERR_NOERROR if the operation is successful. Otherwise, it returns one of the MMSYSERR or MIXERR error codes defined in Mmsystem.h. See mixerGetLineControls return values in the Win32 Software Development Kit (SDK).
Remarks
A client sends the MXDM_GETLINECONTROLS message by calling the user-mode driver's mxmdMessage entry point, passing the specified parameters.
The driver receives an empty MIXERLINECONTROLS structure and fills it in.
Requirements
Header |
mmddk.h |