IAudioRendererWaveOut::SendMessage (Compact 2013)

  • Article

3/26/2014

This method is used to send Waveform Audio messages to the audio device. It is a transparent wrapper for the waveOutMessage function.

Syntax

HRESULT SendMessage(
  UINT  uMsg,
  DWORD dw1,
  DWORD dw2
);

Parameters

  • uMsg
    [in] A UINT value that identifies the message to send to the audio device. The device driver implementation determines how this message is interpreted.
  • dw1
    [in] A DWORD value that contains the message data. The device driver implementation determines how this data is interpreted.
  • dw2
    [in] A DWORD value that contains the message data. The device driver implementation determines how this data is interpreted.

Return Value

Value

Description

S_OK

Success

MMSYSERR_NODRIVER

There has been a failure in the device driver or the filter graph is in the stopped state.

Remarks

Applications should expect that a previously obtained wave out handle will remain valid after a call to IMediaControl::Pause returns. In returning for the pause state, DirectShow makes sure that all resources are allocated before an application calls IMediaControl::Run. Applications should ensure that this wave out handle remains open until the filter graph is stopped through a call to IMediaControl::Stop.

Requirements

Header

dshow.h

Library

Strmiids.lib

See Also

Reference

IAudioRendererWaveOut Interface
waveOutMessage

Other Resources

Waveform Audio