flCmd (ULONG) - input
Some of the DB_* flags are mutually exclusive. Only one of these four can be significant:
DB_ROP
For any border, the pattern used is the pattern as currently defined in the area attribute.
For any interior, the pattern used is the same as if GpiSetAttrs for the area attributes is made with the background color of the area attribute being passed for the foreground color, and the foreground color of the area attribute being passed as the background color.
For any border, the pattern used is the same as if GpiSetAttrs for the area attributes is made with a foreground color of clrFore, and a background color of clrBack.
For any interior, the pattern used is the same as if GpiSetAttrs for the area attributes is made with a foreground color of clrBack, and a background color of clrFore.
DB_ROP and DB_AREAATTRS are also ignored for the interior. The interior is drawn in the color specified by clrBack.