How to detect if Windows Terminal Server is in Install Mode

Question

I can use the following command to find out if a Windows Terminal Server is in Install Mode.

change user /query

How can I detect this programmatically through the Windows API?

Answer 1

It looks like there is no supported way to do it.

Kernel32.dll exports the required function, but the documentation discourages its use. Also, the documentation doesn't list an alternative.

BOOL TermsrvAppInstallMode(void);

http://msdn.microsoft.com/en-us/library/bb432494(v=VS.85).aspx