Thanks Theglord
I managed to use that methode that is explained in the link you provided and also I managed to use the Function SetWindowPos to place the applications where I would like them. It took me a while to figure out a good way to get the correct window handle as some apps use splash screens and it would place that instead of the actual app.
I still have not figured out how to place an app insde a from of my own so I can hide the borders of the existing app. The function that lets me set the external app as a child of my form always seems to create some sort of exception.
Oh well.
I am playing around with multimedia content like DVD, mp3, MPG and so on.