You can use a third party activex control to easily accomplish this.
HTTP Wizard SSL v2.0 will allow you to easily log in retrieve the file using supplied credentials.
Check out
http://www.SeekfordSolutions.com/products/HTTPWizard/This has worked for a number of developers looking to do the same thing.
Hope this helps.
Brian Seekford
Seekford Solutions, Inc.http://www.SeekfordSolutions.comInternet ActiveX Controls and .NET Class Libraries.
SMTP/S FTP POP3/S HTTP/S SNTP MIME PING WHOIS TRACEROUTE NNTP DNS MX
Base64, UUEncode, yEnc, MD5, SHA1, URL, Quoted-Printable.
Resizer and Tooltips
Email Verification and more. Check us out!
