Hi Randy,

Are you sure that you are generating the PNG and the background using the Alpha Channel correctly ?

I'm not sure if you're already aware of a limitation of Internet Explorer, you might have a look at these links too.

http://www.howtocreate.co.uk/alpha.html
http://homepage.ntlworld.com/bobosola/
http://www.pcmag.com/article2/0,1759,1645331,00.asp
http://homepage.ntlworld.com/bobosola/pnghowto.htm

Another good aproach is to use GIFs instead og PNGs. GIFs offer a good support for transparencies and are compatible with all browsers.

Hope this helps

Cesar

>We're looking into creating some classes to integrate GDI+ with our Web Connection (server) apps. Because images need to be displayed on web pages with differing background colors, we want to create transparent PNG files.
>
>I know the PNG file format supports transparent images, however merely setting the alpha channel value on the main graphics backgrounds is not producing the desired result.
>
>Any input welcome.
>
>-- Randy