I forgot to mention that BPTypeIn might not even work, especially in the case that some applications use their own mechanisms for copy/pasting :)

If you try and can get BPTypeIn to simulate those ctrl+x, ctrl+c, ctrl+v (with hotkeys) then a problem could arise upon clicking shortcuts which use these commands...

It's possible (and probable by my experience) that when you click on a shortcut, you transfer focus away from your application to the shortcut (and so BPTypeIn will apply keystrokes on the shortcut instead of your application).

If this is the case, see about how to return window focus...