How do you add a minimize button to the toolwindow?

I have seen it in many programs I would just like to know how you could do this, e.g. ICQ has a min button

I think this would have to be done in API but I can't figure out how

can this not be done??

Do you mean you wanna add it to the caption bar? Or just anywhere on the Form?

yeah the caption bar thats what I ment

thanks Matthew I tried searching but I couldn't find what I was looking for