ESE API at MSDN: https://msdn2.microsoft.com/en-us/library/ms684493.aspx
New features in ESE for Vista/Server 2008: https://msdn2.microsoft.com/en-us/library/aa964797.aspx
ESE overview https://technet.microsoft.com/en-us/library/aa998171.aspx
Wikipedia article: https://en.wikipedia.org/wiki/Extensible_Storage_Engine