VB.net 2005 - Can you make a handmade graphic (drawrectangle and drawline) permanent?

[Joca]

I've made a private sub that creates a graphic (using drawrectangle, string, line and stuff like that) inside a picturebox, so i wouldnt place it right on top of the form itself and also beeing able to move it around. I was aware that the graphic would disappear whenever you minimize or have windows on top it, but was under the impression that all i needed to do for it to stay there was to call the sub in the forms' paint event.
However, this doesnt seem to work very well and i keep getting my picturebox empty at times. I've tried using a timer to run the sub at a steady interval, and it works, but the graphic flickers due to the constant updating.
I'm an absolute newbie at this and would appreciate any help.

Thanks in advance.

[Plater]

Create a bitmap object, then a graphics object from it. Then draw on that graphics object. You can then use the bitmap object wherever you want.

[Joca]

I appreciate your fast answer and will try to make it on my own, but can i ask you for a code example?

Edit: By permanent i meant, a graphic that would always be displayed inside the picturebox and not a way to save it to the harddrive. I dont know if that makes any difference on what you explained.

[Joca]

Nevermind that, I managed to figure it out with your explanation.
My thanks for your great help!