hey- First, Is the system that gave you the error running windows nt? if so you need to use then shellexecute code i gave you, if its running windows 3x/9x, then i haven't the foggiest idea what to tell you other than to try the shellexecute code...it's not a file you're not providing,it sounds like a windows file association somehow got wierded out (but not because of the code i gave you or anything your program is doing)...i suggest just trying the shellexecute code, and if that doesnt work keep posting, and hope one of the great gurus here is reading

Thnx for your time,
CarlosTheJackal