how to connect a mfc app to the inet via ms proxy2.0?

hello,

i have a mfc app which is connecting itself to the internet and does some synchronisation work.
now the problem is that i have to log on to the ms proxy2.0 in order to get a valid connection to the internet.
i can get a dialog which handles the log on for the proxy if i'm using the inetexplorer, but if i'm using my app, no dialog pops up, nor can i get a valid connection...

so my question is how can i log on to the ms proxy2.0 out of my mfc app in order to get a valid inet-connection?

thank you very much,
steve
[572 byte] By [Steve Baerthlein] at [2007-11-18 17:42:32]