Exe Inside another App

Question:
I have and exe vb app. It has 3 textboxes and I would like it to seltext and selstart but I don't have the original code .. just the exe file.

Is there a way to run this inside another vbApp and talk to the textboxes ie.. selstart, focus, etc.

If so, does anyone have an app that would do this? This is no big deal but would be cool if I could get it done.

SendKeys is really handy for that kind of thing.
I used an app designed using sendkeys to pull the entire oxford english dictionary from their application they bundle on cd-rom.

Granted I had to leave it running overnight, but hey it worked :)