WPF create custom controls at runtime

Hello,

In my application, i want to allow user to create custom controls using basic shapes like line, ellipse, rectangle, triangle. So user can select a basic shape just drag and drop in the canvas and create a custom shape which he can use later to drop in the canvas.

I guess we can save the basic shape data in XML and load it later to create the custom control created by user. Is there any existing application or tutorial to do this in WPF.

Thanks in advance,

IamHuM