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The GetVideoPortFieldcallback function determines whether the current field of an interlaced signal is even or odd. This callback is only required if the DDVPCAPS_READBACKFIELDflag is set in the DDVIDEOPORTCAPSstructure.
DWORD __stdcall GetVideoPortField( LPDDHAL_GETVPORTFIELDDATA pgvpfd );
Returns one of the following values:
Last updated on Tuesday, July 13, 2004