>I received this code two weeks ago to center my image on my form.
>
>ThisForm.Image.Left=(ThisForm.Width-ThisForm.Image.Width)/2
>ThisForm.Image.Top=(ThisForm.Height-ThisForm.Image.Height)/2
>
>The image is centered in 800*600 but is not centered in 640*480.
>
>Any idea?

I think it's because there are more than one positioning property setting
available for an image. One of them is Stretching, I believe. I don't know
which setting needs to be used, but you might want to play with them
to get the answer.