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capOverlay
The capOverlay macro enables or disables overlay mode. In overlay mode, video is displayed
using hardware overlay. You can use this macro or explicitly call the WM_CAP_SET_OVERLAY message.
BOOL capOverlay(
Parameters
hwnd
Handle of a capture window.
f
Overlay flag. Specify TRUE for this parameter to enable overlay mode or FALSE
to disable it.
Return Values
Returns TRUE if successful or FALSE otherwise.
Remarks
Using an overlay does not require CPU resources.
The fHasOverlay member of the CAPDRIVERCAPS structure indicates whether the device is capable of overlay. The fOverlayWindow member of the CAPSTATUS structure indicates whether overlay mode is currently enabled.
Enabling overlay mode automatically disables preview mode.
See Also
CAPDRIVERCAPS, CAPSTATUS, WM_CAP_SET_OVERLAY
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