The capDlgVideoSource macro displays a dialog box in which the user can control the video source. The Video Source dialog box might contain controls that select input sources; alter the hue, contrast, brightness of the image; and modify the video quality before digitizing the images into the frame buffer. You can use this macro or explicitly send the WM_CAP_DLG_VIDEOSOURCE message.
BOOL capDlgVideoSource(
hwnd
);
Returns TRUE if successful or FALSE otherwise.
The Video Source dialog box is unique for each capture driver. Some capture drivers might not support a Video Source dialog box. Applications can determine if the capture driver supports this message by checking the fHasDlgVideoSource member of the CAPDRIVERCAPS structure.
Video Capture Overview, Video Capture Macros, CAPDRIVERCAPS, WM_CAP_DLG_VIDEOSOURCE