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static extern int RtlGetVersion(ref OSVERSIONINFOEXW versionInfo);
[DllImport("ntdll.dll", SetLastError : true)]
def RtlGetVersion(ref versionInfo as OSVERSIONINFOEXW) as bool:
[StructLayout(LayoutKind.Sequential, CharSet : CharSet.Unicode)]
dwOSVersionInfoSize as int
dwMajorVersion as int
dwMinorVersion as int
dwBuildNumber as int
dwPlatformId as int
[MarshalAs(UnmanagedType.ByValTStr, SizeConst : 128)]
szCSDVersion as string
wServicePackMajor as UInt16
wServicePackMinor as UInt16
wSuiteMask as UInt16
wProductType as PRODUCT_TYPE
wReserved as byte
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var osvi = default(OSVERSIONINFOEXW);
osvi.dwOSVersionInfoSize = Marshal.SizeOf(typeof(OSVERSIONINFOEXW));
var result = RtlGetVersion(ref osvi);
if (result != 0)
// TODO: Error handling
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