image control in asp4.0

Question

dear all
please tell me that how to use image control of asp4.0 to view an image .. that is located on the disk.
when i write below code
Image1.ImageUrl = "C:\\Documents and Settings\\faraz\\Desktop\\image.jpg";
it is not showing up the image do i need to provide URL wot if my image files a place on disk.
thanks iin adv