Possible resources of terminal service programming

How terminal services work :
http://technet.microsoft.com/en-us/library/cc755399(v=ws.10).aspx

Remote Desktop using C#
http://www.codeproject.com/Articles/43705/Remote-Desktop-using-C-NET

How to get the Client IP address or hostname of a Citrix session or Terminal Services Session ?
http://www.codeproject.com/Articles/25833/How-to-get-the-Client-IP-address-or-hostname-of-a

Extending Microsoft's Terminal Services Client to Provide Seamless Windows
http://www.codeproject.com/Articles/9316/Extending-Microsoft-s-Terminal-Services-Client-To

Remote Desktop Services Virtual Channels
http://msdn.microsoft.com/en-us/library/windows/desktop/aa383509(v=vs.85).aspx

Terminal services programming and RDP Virtual Channels
http://delendanet.blogspot.tw/2010/04/terminal-services-programming-and-rdp.html

How to write a terminal services Add-In in pure C#
http://www.codeproject.com/Articles/16374/How-to-Write-a-Terminal-Services-Add-in-in-Pure-C

Remote Executer for Terminal Server
http://www.mqtechnologies.com/en/TSRemoteExec.aspx

Official Remote Desktop Services Blog
http://blogs.msdn.com/b/rds/