Causes all requests to use a proxy server.
Syntax: SetProxy (Host As String, PortNumber As Int32, BypassOnLocal As Boolean,
Username As String, Password As String)
Host - The name of the proxy host.
PortNumber - The port to use.
BypassOnLocal - Whether to bypass the proxy on local addresses.
Username - User name to use with the proxy.
Password - Password to use with the proxy.