Code for file selection

Gday all

What would people say is the more efficient way to write code to do the following :

I want to set it up that the user selects an (exe) app file from windows explorer, and that file which he has selected (stored) will be executed later on after selecting other files needed.

Any thoughts ?

Thanks

Something like Task Scheduler? You meaning something like an alarm clock that executes an app instead of running a sound eh?

I am trying to integrate 3 programs (like a macro) where the user will select the 3 files as they go, and when they have selected the files, they are called up in order (creating new files/folders on the way)so that each program will not start until the other one has finsihed processing.