CImageDisplay::CountPrefixBits

The CountPrefixBits method calculates the number of zero bits at the start of a specified bit field.

Syntax

DWORD CountPrefixBits(
    const DWORD Field
);

Parameters

Field

Specifies a bit field as a DWORD value.

Return Value

Returns the number of zero bits that occur before the first 1 bit, or 0x80000000 if all bits are zero.

Remarks

This method is useful for working with color masks in VIDEOINFO structures.

See Also

• CImageDisplay Class