I am looking for a progamatic way to change the background color of GIF's from somehting that is near black (varies by image) to white. Does anyone have a way to do this - GDI+ maybe?

An app I am working on has a database of over 53,000 images that do not have their backgrounds, and thus the transparency color, set to white.

Thank you,
Todd Cottengim
Redding, CA