C# Definition:

[StructLayout(LayoutKind.Sequential)]  
struct OSVERSIONINFOEX {
   public int dwOSVersionInfoSize;  
   public int dwMajorVersion;  
   public int dwMinorVersion;  
   public int dwBuildNumber;  
   public int dwPlatformId;
   [MarshalAs(UnmanagedType.ByValTStr, SizeConst=128)]
   public string szCSDVersion;
   public UInt16 wServicePackMajor;  
   public UInt16 wServicePackMinor;  
   public UInt16 wSuiteMask;
   public byte wProductType;  
   public byte wReserved;

}

VB Definition:

Structure OSVERSIONINFOEX
   Public TODO
End Structure

User-Defined Field Types:

None.

Notes:

Use the overloaded API call GetVersionEx().