问题 When resizing down in DirectX I noticed a flicker along the bottom/right edges. If you fix the size of the swapchain (in red), and set the win32 background to green you will get the following on a resize down: It appears that the window size lags behind the mouse position ("Drag Rectangle") but the area DirectX fills (in red and black) matches the Drag Rectangle, with the remainder to be painted with the window background color (green). The DirectX Utility Toolkit (DXUT) didn't have this