I've created non-rectangular window with my own style. It is Grid which contain custom close/min/max buttons, title area, 8 rectangles for resizing and of course Grid for window content (LayoutRoot). All of it working with c# event handlers at code-behind file.
Now i need to make this construction reusable and available from toolbox at MSVS or Blend. All what i need is that another developer can add my window from toolbox to his project and working with it like with normal window. He must have access only to layout root.
P.S. I hope i can explain what i need =)