Hauppauge WinTV USB - Manual (Page 47)

patibility problems, or improving picture quality on some VGA boards when
used in some resolutions.
To use Primary Surface mode, run the program "PRIMARY", which is installed
with the WinTV application. Click Start/ Programs/WinTV and then, Click on
Primary. Click on Force Primary or DIB Draw then close the program by clicking
on the X. The Primary program simply makes a setting in the Windows Registry
that tells the application to use the Primary mode or DIB Draw mode of opera-
tion.
This can be changed at any time to "Allow Overlay" by re-running Primary and
clicking Allow Overlay or DIB Draw.
7-3
WinTV-USB
Installation and Reference Manual