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The WM_CAP_DLG_VIDEODISPLAY message displays a dialog box in which the user can set or adjust the video output. This dialog box might contain controls that affect the hue, contrast, and brightness of the displayed image, as well as key color alignment. You can send this message explicitly or by using the capDlgVideoDisplay macro.

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

Return Value

Returns TRUE if successful or FALSE otherwise.


The controls in this dialog box do not affect digitized video data; they affect only the output or redisplay of the video signal.

The Video Display dialog box is unique for each capture driver. Some capture drivers might not support a Video Display dialog box. Applications can determine if the capture driver supports this message by checking the fHasDlgVideoDisplay member of the CAPDRIVERCAPS structure.


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



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