public static bool UacEnabled()
{
if (Environment.OSVersion.Platform != PlatformID.Win32NT ||
Environment.OSVersion.Version < new Version(6, 0))
{
return false;
}
SafeTokenHandle hToken = new SafeTokenHandle();
bool result = NativeMethods.OpenProcessToken(KernelApi.NativeMethods.GetCurrentProcess(),
NativeMethods.TOKEN_QUERY, out hToken);
if (!result || hToken.IsInvalid)
throw KernelApi.GetExceptionForWin32Error(Marshal.GetLastWin32Error());
IntPtr pElevationType = Marshal.AllocHGlobal(Marshal.SizeOf(
typeof(NativeMethods.TOKEN_ELEVATION_TYPE)));
try
{
uint returnSize = 0;
result = NativeMethods.GetTokenInformation(hToken,
NativeMethods.TOKEN_INFORMATION_CLASS.TokenElevationType,
pElevationType, sizeof(NativeMethods.TOKEN_ELEVATION_TYPE),
out returnSize);
if (!result)
throw KernelApi.GetExceptionForWin32Error(Marshal.GetLastWin32Error());
NativeMethods.TOKEN_ELEVATION_TYPE elevationType =
(NativeMethods.TOKEN_ELEVATION_TYPE)Marshal.PtrToStructure(
pElevationType, typeof(NativeMethods.TOKEN_ELEVATION_TYPE));
return elevationType != NativeMethods.TOKEN_ELEVATION_TYPE.TokenElevationTypeDefault;
}
finally
{
Marshal.FreeHGlobal(pElevationType);
}
}
public static extern bool OpenProcessToken(IntPtr ProcessHandle, UInt32 DesiredAccess, out SafeTokenHandle TokenHandle);
public static extern bool GetTokenInformation(SafeTokenHandle TokenHandle, TOKEN_INFORMATION_CLASS TokenInformationClass, IntPtr TokenInformation, uint TokenInformationLength, out uint ReturnLength);