>http://support.microsoft.com/support/kb/articles/Q186/7/22.ASP
>HOWTO: Programmatically Install a True Type Font in vfp

(Man, that article looks familiar :-) That code does not check to see if the font already exists, though. However, I can't see why that would make a difference. If you install the same font over the existing one, no harm, no foul IMO. But if one needs to check, I think the sample code will give the clues needed to figure this out.