[BUILD] Which license do I need to build a professional edition of LibreOffice (4.0.x/4.1.x) of windows ?

Hello, I still have problem to build under windows, but I wanted to know, what do I need to build 
LibreOffice (4.0.x/4.1.x) entirely as the original available in the website.



First can you confirm that I need a certificate to sign the DLL and a license of Visual Studio 12 
(without I can't build ATL and ActiveX modules).



Which version of Windows is the best? Do I need a pro version or a familial one?



Thanks for your answer, if you find others license/not free component (in cygwin dependency or 
Microsoft tools by example) don't hesitate to tell me.



Matthieu GAY.






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