Resizing the user control by mouse

I need some help desperately on this.
I have been trying to build a module for an internet Application. What I need to have is something
similar to a Standard VB kind of Environment within the Browser,where the User could drag and drop some controls,Resize these Controls, Set their properties etc.
What I wanna accomplish is very similar to the .net IDE, where we could drag and drop controls from the Toolbar, resize them, host them with in container controls, set their properties etc. I want my controls to behave as in a Design Time Environment, but they tend to behave as if they are in Run time Environment.
I tried the same with windows control library.
Having used the user control i accomplished something.But i am not able to resize my user controls while in IE using mouse. Have anyone tried to build an Editor like this on IE using VB.net/c# ? I would appreciate it a lot if any of you could point me in the right direction.

The web (and browsers) aren't really designed or meant for this. You could achieve something similar though, with DHTML, but it would be an immensly complex task. You might have more luck using something like Flash.