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The WM_CAP_SEQUENCE message initiates streaming video and audio capture to a file. You can send this message explicitly or by using the capCaptureSequence macro.

wParam = (WPARAM) 0; 
lParam = 0L; 

Return Value

Returns TRUE if successful or FALSE otherwise.

If an error occurs and an error callback function is set using the WM_CAP_SET_CALLBACK_ERROR message, the error callback function is called.


If you want to alter the parameters controlling streaming capture, use the WM_CAP_SET_SEQUENCE_SETUP message prior to starting the capture.

By default, the capture window does not allow other applications to continue running during capture. To override this, either set the fYield member of the CAPTUREPARMS structure to TRUE, or install a yield callback function.

During streaming capture, the capture window can optionally issue notifications to your application of specific types of conditions. To install callback procedures for these notifications, use the following messages:


Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]



See also

Video Capture
Video Capture Messages