The Password property specifies the password used to
authenticate the user. If a password is not required by the server,
this property is ignored.
UserName and Password properties are typically
required for HTTP uploads and FTP connections. They are typically
not required for HTTP downloads.
For HTTP, this control supports the Basic Authentication method
only. If a server requires a different scheme, such as NTLM, for a
specific request, the request will be rejected by the server.
If the UserName and Password properties are
undefined for an FTP connection attempt, then anonymous FTP will be
used.