The ICM_DRAW_RENDERBUFFER message notifies a rendering driver to draw the frames that have been passed to it. You can send this message explicitly or by using the ICDrawRenderBuffer macro.
ICM_DRAW_RENDERBUFFER
wParam = 0;
lParam = 0;
This message does not return a value.
Use this message with hardware that performs its own asynchronous decompression, timing, and drawing.
This message is typically used to perform a seek operation when the driver must be specifically instructed to display each video frame passed to it rather than playing a sequence of video frames.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in vfw.h.
Video Compression Manager Overview, Video Compression Messages, ICDrawRenderBuffer