Thanks for your reply frederick, but your solution assumes that an application is already active.
What I want is to somehow determine what kind of dwg I am dealing with and depending on that, start the appropriate application.
Something like this:
Find somekind of (windows) property which tells me what kind of dwg it is.
if (dwg,type == inventordwg) open the drawing in inventor
else open it in autocad.
The property must be somewhere, because when I double click on a dwg in the windows explorer, it knows which application to use to open it.
