Pau Thank you for your reply. > It's easier than that, just make use of cmdow: > http://www.commandline.co.uk/cmdow/ Looks nice, but swallows output from the .EXE. > But I think it would be better if you had a DLL instead of a .EXE and you > could call the functions in the DLL instead of running the .EXE. OK, I can try, but how do I call DLLs from within Ruby? Through WIN32OLE? All the best