>Does anybody know the correct syntax in VFP to declare and call
>the "keybd_event" API function?
>
>I'm running an external application which when it runs presents the user with a Yes and No button, with the Yes button set as the default. I am trying to automate the execution of this external function as much as possible and want to programmatically press the Enter key to trigger the Yes button and conclude the process.

I think you're going to need to use several API calls to do this, at a minimum, you'll need to know the hWnd of the messagebox so that you can call SetFocus() to point the keyboard focus to the target window, and then issue a keybd_event, since keybd_event doesn't set the context that the keystroke is processed in.