Indicator (ULONG) - input
Equals 1 to activate ANSI support, or 0 to deactivate ANSI.
VioHandle (HVIO) - input
This must be 0, unless the caller is a Presentation Manager application; in this case, it must be the value returned by VioCreatePS.
rc (APIRET) - returns
VioSetAnsi returns one of the following values: