TIdHTTP and Proxy??

Hello Developer,

I need your help. Id like to know how to configue TIdHTTP access internet
by proxy? I tried to download an image from web but I got a error message.
Without proxy TIdHTTP works great, but I am having problem when I need to do
it by proxy. I'm using indy version 9.0.2 B.

Thanks,

Heriberto