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MXDM_GETNUMDEVS (Compact 2013)

  • Article

3/26/2014

This message requests a user-mode mixer driver to return the number of device instances that it supports.

Syntax

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

Members

  • uDeviceId
    Device identifier for the target device. It can be 0, 1, 2, and so on.
  • uMsg
    Equals MXDM_GETNUMDEVS.
  • dwUser
    Not used.
  • lParam1
    Not used.
  • lParam2
    Not used.

Return Value

Returns the number of devices the driver supports.

Remarks

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

Requirements

Header

mmddk.h

See Also

Reference

Audio Mixer Messages