coopster - 5:39 pm on Jan 12, 2012 (gmt 0)
I do not know how to do this in ASP or .NET but what I do when I need to post to a site like that is open a socket connection and handle the transaction on the server side. So your VB.NET server talks to the remote PHP-enabled server via a socket connection. A handy tool for this is cURL. Rather than open and control the socket and communication you can use the cURL API's for your particular server platform.