Background Image does not expand ?

Question

I Built a logo (Bitmap Image) the size of my window form. It looks fine when I run the debuger, howener when I enlarge the window (upper right hand control) the window expands but the background image does not, it tiles the image into 4 seperate images. I am working with the windows properity control box in vb.net, I know little about code yet. Any ideas would be helpful. Tnx, Chuck