Hello Irin
The purpose of this forum is to support the Open Specifications documentation. You can read about the Microsoft Open Specifications program from http://www.microsoft.com/openspecifications/en/us/default.aspx
The library of Open Specification documents can be accessed from http://msdn.microsoft.com/en-us/library/dd208104(PROT.10).aspx.
As your query is more suitable for this forum, kindly repost your query to following forum -
http://www.surfaceforums.net/forums/microsoft-surface-pro-3.49/
Thanks.
Tarun Chopra | Escalation Engineer | Open Specifications Support Team