A root block is always the first block in the version resource. It contains such information as the file version, product version, release status, operating system, file type, and date the file was created.
The name of the root block, as specified by the szKey member, is VS_VERSION_INFO. The value (in abValue) is a VS_FIXEDFILEINFO structure. For a description of the VS_FIXEDFILEINFO structure, see the Microsoft Windows Programmer's Reference, Volume 3.
The variable and string information blocks in the resource are nested within the root block.