fixing images to locations

Hello,

I have experimented with code from two samples on the website, placing a series of dots on the map with right mouse clicks and also generating a circle, both using the system.drawing.graphics. These are both working except that one of them (the circle) doesn't move with the map as I scroll it.
Would it be possible to give the actual command that "binds" a graphics drawing to a position on a map?

Also, I'd really like to place my own images (bitmaps, gifs, etc) on a map and have them "bound" to a location. I can easily place the image in the correct location and I could probably code it to move it accordingly but if it is possible to do it using built-in functionality that would be great.

Thanks