I think you are going to be out of luck on this one. TS and RD are the same thing to the OS. Full TS is available on servers and RD is available on WindowsXP only. What I would do is check for the version of OS and not what type of TS you are running. If your system call returns a TS type environment, then check for the OS type. If it is XP Pro, then you are on RD, if it is Windows 2000 Server or Server 2003, then you are in full TS.