The WM_CAP_SINGLE_FRAME_OPEN message opens the capture file for single-frame capturing. Any previous information in the capture file is overwritten. You can send this message explicitly or by using the capCaptureSingleFrameOpen macro.
WM_CAP_SINGLE_FRAME_OPEN
wParam = (WPARAM) 0;
lParam = 0L;
Returns TRUE if successful or FALSE otherwise.
For information about installing callback functions, see the WM_CAP_SET_CALLBACK_ERROR and WM_CAP_SET_CALLBACK_FRAME messages.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in vfw.h.
Video Capture Overview, Video Capture Messages, capCaptureSingleFrameOpen, WM_CAP_SET_CALLBACK_ERROR, WM_CAP_SET_CALLBACK_FRAME