>What you should do here is change the GIFs so that white is set to be the Transparent color. 7 handled the drawing itself: 8 is handing it off to GDI+. GDI+ doesn't consider White to be transparent, which is where the problem comes in.
>
>I don't know why different 8 boxes are handling this differently, though. Might be another problem I'm missing.

Hi Garrett,

Yep, we figured out that the reason was because we hadn't set any transparent colours in the .GIFs we use MS Paint so it really isn't possible (Am I correct?), I tried a conversion program (ReaGif) but it didn't seem to create the transparent colour correctly.

Why it works on some machines and not others? Well the machines it works on are completely blank XP machines (Using the Virtual PC that comes in MSDN if that makes a difference?) and the ones it doesn't work on are our companies standard PCs.

So I was thinking that maybe one of our companies standard programs (Office etc.) might be installing a different GIF decoder function (You know how sometimes on a blank XP PC the MS Paint can't save in all formats until you install some other program that installs GIF support or whatever?) that may handle GIFs differently to the default Windows XP decoder?

In the end I just finished converting all of the GIFs in the program to BMPs about 5 minutes before Ken posted his answer.

Chris.