[Gtk-sharp-list] Draggable Objects

[Robert Brown]

I am a bit of a GTK noob so please excuse my ignorance when asking this
question...

I am trying to create a simple app that lets me drop objects (images) onto
a something like a canvas.  However once the object is dropped on the
canvas I want to be able to select it and move it around at a later time;
I don't want to paint the image on the canvas.

Really what i am trying to do is something like Visio, I can drop
graphical objects onto a canvas but be able to interact with them later. 
How do I do something like this in GTK#?  Are there any examples on the
web?

Thanks, in advance, for anyones help.

-=Robert