Picture Box problem

I am using a picture box in "graphics method" mode e.g drawing on it with SetPixel and Line.

Is there anyway (other than using paint event) to refresh the graphics after they have been written over by another window. I cant re-draw the graphics but can I save them and redraw them in a paint event?

Cheers

Set the Picturebox's AutoRedraw property to True

I`ve tried this, but if I set autoredraw=true (design time) Only the first pixel I plot gets drawn however if I drag a window over my picture box then the other pixels appear.

Any ideas?