Drawing interactively on
makes little sense, as most of the thing people try to do with this component. You really need to draw on custom control (derived from
, even on Form, but not on
. You can even save the image after interactive drawing if you abstract out the rendering method (by drawing on other media such as
and saving it).
To read about how to do it, please see my past answer:
How do I clear a panel from old drawing