there is not much you can do with an Image control besides loading an Image. But you can use the BorderStyle property to mark a selected Image. Set the BorderStyle to 0 (no border) and change it in the Click event (and remember to reset it for the previously selected Image) If you want something more fancy, you can draw a rectangle around the Image using the Line method of the Form object (this is more tricky because you have to redraw it in the form Paint event)
"There are two ways to write error-free programs. Only the third one works."