Possible to query the ServerLayout Identifier?

[Bernhard Prell]

Hello,

I have set up multiple ServerLayouts in my xorg.conf 
and pass the one that I want to use via the "-layout" paramter 
to X when starting. 

I would like to to find out this currently selected 
layout-identifier-string in a C-program
(by asking the X-Server and not by parsing the Xorg.log :-) )

Is it possible and how?

Thank you very much for a hint,

Bernhard