>I am trying to send API calls to other window applications through FoxPro. I am using SendInput to send the keystrokes. I am able to send character information, but am unable to send key combinations like ALT+F and ALT+F4 in order to open a file and to close the application. Any help on this would be appreciated.

Terry,

It's much easier to do with WHS, if you can use it. Check Re: SendInput Function Message #814854.