|Microsoft DirectX 9.0|
The DisplayModeChanged method informs the VMR that a WM_DISPLAYCHANGE message has been received by the application.
This method takes no parameters.
If the method succeeds, it returns S_OK. If it fails, it returns an error code.
|VFW_E_WRONG_STATE||The VMR is not in windowless mode.|
An application must call this method whenever it receives a WM_DISPLAYCHANGE window message, but only if the VMR is currently in windowless mode.