Need app to run a program once another one closes

I am looking for a good, reliable application that would run program B once program A is shut down. Here is the situation… I need a file transfer utility that requires user intervention to run after a specific application is shut down. Another, less desirable option would be to have a dialog box prompt a reminder to run the file transfer app after the other application is shut down.

I saw an application called AutoIt which seems like it may allow me to develop a script to do what I need to do. Does anyone have any experience with AutoIt? Any other suggestions?

Thanks in advance.

Brian