versioninfo FileMajorVersion property
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Applies to
dcVersionInfo component.  

property FileMajorVersion: LongInt; // Read only!  

The FileMajorVersion property represents the left-most 32 bits of the file version number.  
FileMajorVersion and FileMinorVersion are used together to build a 64-bit file version number. The 64-bit value is represented in Microsoft's file version format.  
tip Use HiWord(FileMajorVersion) and LoWord(FileMajorVersion) functions to convert this 32-bit number to 16-bit version values.  
Following code demonstrates how to convert FileMajorVersion value to the real version number (major and minor):  
with dcVersionInfo1 do  
  Label1.Caption := IntToStr(HiWord(FileMajorVersion)) + '.' + IntToStr(LoWord(FileMajorVersion));  

See also
FileMinorVersion, ProductMajorVersion, ProductMinorVersion, FileVersion, FileVersionFloat properties.