how use proxy

[Silvio]

i want make an application to update an application
it run ok but only from my home because from school i have a proxy
how i must make to use a proxy ?
when i go to IE or update an antivirus it ask me port user and password
how i can make it on my update function before to download from an url the updates's files ?
thanks in advance

[Antonio Linares]

Silvio,

Are you able to download a file from IE in the school ?

[Silvio]

yes but I must before ( when I open IE) to digit the user and the password