Specifies the content of the back buffer in the double-buffered main color plane following a buffer swap. Swapping the color buffers causes the exchange of the back buffer's content with the front buffer's content. Following the swap, the back buffer's content contains the front buffer's content before the swap. PFD_SWAP_EXCHANGE is a hint only and might not be provided by a driver.
Gdi Class | Tao.Platform.Windows Namespace