one more I promise ... opening a folder automatically?

I am pretty sure you have to be able to do this. I want to automatically open a folder within C:\ProgramFiles\ without having to ask the user to enter anything. Can this be done? I would also like to be able to close it as well. i.e. System.IO.File.Open("c:\Program Files\Adobe") it doesn't like this code ... it says that 'no available open will accept this many arguments' I have no idea .. I'M AT MY WITS END HERE!! thanks for all your help I just need a little more