IVMRWindowlessControl9::DisplayModeChanged method (vmr9.h)

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 DisplayModeChanged method informs the VMR that a WM_DISPLAYCHANGE message has been received by the application.

Syntax

HRESULT DisplayModeChanged();

Return value

The method returns an HRESULT. Possible values include those in the following table.

Remarks

An application must call this method whenever it receives a WM_DISPLAYCHANGE window message, but only if the VMR is currently in windowless mode.

Include DShow.h and D3d9.h before Vmr9.h.

Requirements

See also

IVMRWindowlessControl9 Interface

Using the Video Mixing Renderer