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MXDM_GETDEVCAPS (Compact 2013)

  • Article

3/26/2014

This message requests a user-mode mixer driver to return capabilities information about the specified device.

Syntax

typedef struct {
  DWORD uDeviceId;
  UINT uMsg;
  DWORD dwUser;
  DWORD lParam1;
  DWORD lParam2;
} MXDM_GETDEVCAPS;

Members

  • uDeviceId
    Device identifier for the target device. It can be 0, 1, 2, and so on.
  • uMsg
    Equals MXDM_GETDEVCAPS.
  • dwUser
    Instance identifier associated with the caller.
  • lParam1
    Pointer to a MIXERCAPS structure.
  • lParam2
    Size of the buffer pointed to by lParam1.

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 mixerGetDevCaps return values in the Win32 Software Development Kit (SDK).

Remarks

A client sends the MXDM_GETDEVCAPS message by calling the user-mode driver's mxmdMessage entry point, passing the specified parameters.

The driver receives an empty MIXERCAPS structure and fills it in.

Requirements

Header

mmddk.h

See Also

Reference

Audio Mixer Messages