Hello there,
             I want to know how its possible to draw lines , curves or any other objects on a picture . I can draw these shapes on the form itself but not an an image located in a picture box. Can anyone help me with this?

Thanks,
Dinesh

Take a look at the classes in the System.Drawing namespace. There you can create a new blank bitmap canvas, or create one from an existing image. Then you can use the various drawing classes and methods to draw things onto the canvas.