Edit

Share via

IVideoWindow::NotifyOwnerMessage method (control.h)

  • Article

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The NotifyOwnerMessage method forwards a message to the video window.

Syntax

HRESULT NotifyOwnerMessage(
  [in] OAHWND   hwnd,
  [in] long     uMsg,
  [in] LONG_PTR wParam,
  [in] LONG_PTR lParam
);

Parameters

[in] hwnd

A handle to the window, as an OAHWND value.

[in] uMsg

Specifies the message.

[in] wParam

Message parameter.

[in] lParam

Message parameter.

Return value

Possible return values include the following:

Return code Description
S_OK
 Success.
VFW_E_NOT_CONNECTED
 The video renderer filter is not connected.

Remarks

The Filter Graph Manager calls this method to pass various messages to the renderer, including the following:

  • WM_ACTIVATEAPP
  • WM_DEVMODECHANGE
  • WM_DISPLAYCHANGE
  • WM_PALETTECHANGED
  • WM_PALETTEISCHANGING
  • WM_QUERYNEWPALETTE
  • WM_SYSCOLORCHANGE

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header control.h (include Dshow.h)
Library Strmiids.lib

See also

Error and Success Codes

IVideoWindow Interface