Download What is a DT-Active Frame Grabber Control?

Chapter 3
Set up Overlays
Enable overlays with the
OverlayEnabled property.
Set the color key with
the OverlayColorKey property.
Using
bitmap file
on overlay
surface?
Yes
Specify path to file with
the OverlayBitmapFile
property.
No
Drawing
on overlay
surface?
No
Yes
Get a device context with
the GetDC method.
Respond to the OnUpdateOverlay event
whenever an ROI/frame is acquired.
Draw an image on the overlay surface with
standard GDI functions.
Release the device context with
the ReleaseDC method.
Return to main flowchart.
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