Size of Dialog used as Child MDI Window

I use a Dialog as a Child MDI Window, but the size of the Dialogbox
isn't that, I defined with the resource editor. How can I set the initial
size of it.

Try MoveWindow(x1,y1,x2,y2) in your InitialUpdate() or InitDialog()

Hi..thank you for your help. My problem is, how can I get the initial size
of the dialog box (as defined with resource editor). I want to see the box
in it's original size. Now I see only a part of the dialog-box (with scroll-bars).
Have I new calculate the size of the box?