Setting mouse cursor from Row,Col

I need to position the mouse cursor under program control from a TPoint
(Row,Col) in TVision - it's for a macro replay program. I can easily get
mouse cursor position in terms of Row,Col but I need to do the reverse -
to Put the cursor. Obviously it is screen mode dependent too. Is this a
bios call or something? Where can I find the scale factors required.
Mickeys?
BRi