Daniel,
Thanks for the reply. I realize the world file is giving the coordinates of the top left pixel location, and then the number in the first and fourth are giving the size of each pixel. However, how would could I get any of the other locations besides that top left? In the live sample given that dbroux linked to, it gives the coordinates of the bottom left and top right locations of that video image. Maybe there is some kind of equation I could use to get coordinates of another corner? Seems like I would need to know how many pixels there are in height and width and not sure how I can get that info without special software. Also, looks like I need the bottom left(southwest corner) and top right (northeast corner) based on the Silverlight example.