Получить окно UAC для выполнения действия от имени привилегированной учетной записи

#region Helper Functions for Admin Privileges and Elevation Status
 
       
        internal static bool IsUserInAdminGroup()
        {
            bool fInAdminGroup = false;
            SafeTokenHandle hToken = null;
            SafeTokenHandle hTokenToCheck = null;
            IntPtr pElevationType = IntPtr.Zero;
            IntPtr pLinkedToken = IntPtr.Zero;
            int cbSize = 0;
 
            try
            {
                // Open the access token of the current process for query and duplicate.
                if (!NativeMethods.OpenProcessToken(Process.GetCurrentProcess().Handle,
                    NativeMethods.TOKEN_QUERY | NativeMethods.TOKEN_DUPLICATE, out hToken))
                {
                    throw new Win32Exception();
                }
 
                // Determine whether system is running Windows Vista or later operating 
                // systems (major version >= 6) because they support linked tokens, but 
                // previous versions (major version < 6) do not.
                if (Environment.OSVersion.Version.Major >= 6)
                {
                    // Running Windows Vista or later (major version >= 6). 
                    // Determine token type: limited, elevated, or default. 
 
                    // Allocate a buffer for the elevation type information.
                    cbSize = sizeof(TOKEN_ELEVATION_TYPE);
                    pElevationType = Marshal.AllocHGlobal(cbSize);
                    if (pElevationType == IntPtr.Zero)
                    {
                        throw new Win32Exception();
                    }
 
                    // Retrieve token elevation type information.
                    if (!NativeMethods.GetTokenInformation(hToken,
                        TOKEN_INFORMATION_CLASS.TokenElevationType, pElevationType,
                        cbSize, out cbSize))
                    {
                        throw new Win32Exception();
                    }
 
                    // Marshal the TOKEN_ELEVATION_TYPE enum from native to .NET.
                    TOKEN_ELEVATION_TYPE elevType = (TOKEN_ELEVATION_TYPE)
                        Marshal.ReadInt32(pElevationType);
 
                    // If limited, get the linked elevated token for further check.
                    if (elevType == TOKEN_ELEVATION_TYPE.TokenElevationTypeLimited)
                    {
                        // Allocate a buffer for the linked token.
                        cbSize = IntPtr.Size;
                        pLinkedToken = Marshal.AllocHGlobal(cbSize);
                        if (pLinkedToken == IntPtr.Zero)
                        {
                            throw new Win32Exception();
                        }
 
                        // Get the linked token.
                        if (!NativeMethods.GetTokenInformation(hToken,
                            TOKEN_INFORMATION_CLASS.TokenLinkedToken, pLinkedToken,
                            cbSize, out cbSize))
                        {
                            throw new Win32Exception();
                        }
 
                        // Marshal the linked token value from native to .NET.
                        IntPtr hLinkedToken = Marshal.ReadIntPtr(pLinkedToken);
                        hTokenToCheck = new SafeTokenHandle(hLinkedToken);
                    }
                }
 
                // CheckTokenMembership requires an impersonation token. If we just got 
                // a linked token, it already is an impersonation token.  If we did not 
                // get a linked token, duplicate the original into an impersonation 
                // token for CheckTokenMembership.
                if (hTokenToCheck == null)
                {
                    if (!NativeMethods.DuplicateToken(hToken,
                        SECURITY_IMPERSONATION_LEVEL.SecurityIdentification,
                        out hTokenToCheck))
                    {
                        throw new Win32Exception();
                    }
                }
 
                // Check if the token to be checked contains admin SID.
                WindowsIdentity id = new WindowsIdentity(hTokenToCheck.DangerousGetHandle());
                WindowsPrincipal principal = new WindowsPrincipal(id);
                fInAdminGroup = principal.IsInRole(WindowsBuiltInRole.Administrator);
            }
            finally
            {
                // Centralized cleanup for all allocated resources. 
                if (hToken != null)
                {
                    hToken.Close();
                    hToken = null;
                }
                if (hTokenToCheck != null)
                {
                    hTokenToCheck.Close();
                    hTokenToCheck = null;
                }
                if (pElevationType != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(pElevationType);
                    pElevationType = IntPtr.Zero;
                }
                if (pLinkedToken != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(pLinkedToken);
                    pLinkedToken = IntPtr.Zero;
                }
            }
 
            return fInAdminGroup;
        }
 
 
        internal static bool IsRunAsAdmin()
        {
            WindowsIdentity id = WindowsIdentity.GetCurrent();
            WindowsPrincipal principal = new WindowsPrincipal(id);
            return principal.IsInRole(WindowsBuiltInRole.Administrator);
        }
 
 
        
        internal static bool IsProcessElevated()
        {
            bool fIsElevated = false;
            SafeTokenHandle hToken = null;
            int cbTokenElevation = 0;
            IntPtr pTokenElevation = IntPtr.Zero;
 
            try
            {
                // Open the access token of the current process with TOKEN_QUERY.
                if (!NativeMethods.OpenProcessToken(Process.GetCurrentProcess().Handle,
                    NativeMethods.TOKEN_QUERY, out hToken))
                {
                    throw new Win32Exception();
                }
 
                // Allocate a buffer for the elevation information.
                cbTokenElevation = Marshal.SizeOf(typeof(TOKEN_ELEVATION));
                pTokenElevation = Marshal.AllocHGlobal(cbTokenElevation);
                if (pTokenElevation == IntPtr.Zero)
                {
                    throw new Win32Exception();
                }
 
                // Retrieve token elevation information.
                if (!NativeMethods.GetTokenInformation(hToken,
                    TOKEN_INFORMATION_CLASS.TokenElevation, pTokenElevation,
                    cbTokenElevation, out cbTokenElevation))
                {
                    // When the process is run on operating systems prior to Windows 
                    // Vista, GetTokenInformation returns false with the error code 
                    // ERROR_INVALID_PARAMETER because TokenElevation is not supported 
                    // on those operating systems.
                    throw new Win32Exception();
                }
 
                // Marshal the TOKEN_ELEVATION struct from native to .NET object.
                TOKEN_ELEVATION elevation = (TOKEN_ELEVATION)Marshal.PtrToStructure(
                    pTokenElevation, typeof(TOKEN_ELEVATION));
 
                // TOKEN_ELEVATION.TokenIsElevated is a non-zero value if the token 
                // has elevated privileges; otherwise, a zero value.
                fIsElevated = (elevation.TokenIsElevated != 0);
            }
            finally
            {
                // Centralized cleanup for all allocated resources. 
                if (hToken != null)
                {
                    hToken.Close();
                    hToken = null;
                }
                if (pTokenElevation != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(pTokenElevation);
                    pTokenElevation = IntPtr.Zero;
                    cbTokenElevation = 0;
                }
            }
 
            return fIsElevated;
        }
 
 
        /// <summary>
        /// The function gets the integrity level of the current process. Integrity 
        /// level is only available on Windows Vista and newer operating systems, thus 
        /// GetProcessIntegrityLevel throws a C++ exception if it is called on systems 
        /// prior to Windows Vista.
        /// </summary>
        /// <returns>
        /// Returns the integrity level of the current process. It is usually one of 
        /// these values:
        /// 
        ///    SECURITY_MANDATORY_UNTRUSTED_RID - means untrusted level. It is used 
        ///    by processes started by the Anonymous group. Blocks most write access.
        ///    (SID: S-1-16-0x0)
        ///    
        ///    SECURITY_MANDATORY_LOW_RID - means low integrity level. It is used by
        ///    Protected Mode Internet Explorer. Blocks write acess to most objects 
        ///    (such as files and registry keys) on the system. (SID: S-1-16-0x1000)
        /// 
        ///    SECURITY_MANDATORY_MEDIUM_RID - means medium integrity level. It is 
        ///    used by normal applications being launched while UAC is enabled. 
        ///    (SID: S-1-16-0x2000)
        ///    
        ///    SECURITY_MANDATORY_HIGH_RID - means high integrity level. It is used 
        ///    by administrative applications launched through elevation when UAC is 
        ///    enabled, or normal applications if UAC is disabled and the user is an 
        ///    administrator. (SID: S-1-16-0x3000)
        ///    
        ///    SECURITY_MANDATORY_SYSTEM_RID - means system integrity level. It is 
        ///    used by services and other system-level applications (such as Wininit, 
        ///    Winlogon, Smss, etc.)  (SID: S-1-16-0x4000)
        /// 
        /// </returns>
        /// <exception cref="System.ComponentModel.Win32Exception">
        /// When any native Windows API call fails, the function throws a Win32Exception 
        /// with the last error code.
        /// </exception>
        internal static string GetProcessIntegrityLevel()
        {
            int IL = -1;
            SafeTokenHandle hToken = null;
            int cbTokenIL = 0;
            IntPtr pTokenIL = IntPtr.Zero;
 
            try
            {
                // Open the access token of the current process with TOKEN_QUERY.
                if (!NativeMethods.OpenProcessToken(Process.GetCurrentProcess().Handle,
                    NativeMethods.TOKEN_QUERY, out hToken))
                {
                    throw new Win32Exception();
                }
 
                // Then we must query the size of the integrity level information 
                // associated with the token. Note that we expect GetTokenInformation 
                // to return false with the ERROR_INSUFFICIENT_BUFFER error code 
                // because we've given it a null buffer. On exit cbTokenIL will tell 
                // the size of the group information.
                if (!NativeMethods.GetTokenInformation(hToken,
                    TOKEN_INFORMATION_CLASS.TokenIntegrityLevel, IntPtr.Zero, 0,
                    out cbTokenIL))
                {
                    int error = Marshal.GetLastWin32Error();
                    if (error != NativeMethods.ERROR_INSUFFICIENT_BUFFER)
                    {
                        // When the process is run on operating systems prior to 
                        // Windows Vista, GetTokenInformation returns false with the 
                        // ERROR_INVALID_PARAMETER error code because 
                        // TokenIntegrityLevel is not supported on those OS's.
                        throw new Win32Exception(error);
                    }
                }
 
                // Now we allocate a buffer for the integrity level information.
                pTokenIL = Marshal.AllocHGlobal(cbTokenIL);
                if (pTokenIL == IntPtr.Zero)
                {
                    throw new Win32Exception();
                }
 
                // Now we ask for the integrity level information again. This may fail 
                // if an administrator has added this account to an additional group 
                // between our first call to GetTokenInformation and this one.
                if (!NativeMethods.GetTokenInformation(hToken,
                    TOKEN_INFORMATION_CLASS.TokenIntegrityLevel, pTokenIL, cbTokenIL,
                    out cbTokenIL))
                {
                    throw new Win32Exception();
                }
 
                // Marshal the TOKEN_MANDATORY_LABEL struct from native to .NET object.
                TOKEN_MANDATORY_LABEL tokenIL = (TOKEN_MANDATORY_LABEL)
                    Marshal.PtrToStructure(pTokenIL, typeof(TOKEN_MANDATORY_LABEL));
 
                // Integrity Level SIDs are in the form of S-1-16-0xXXXX. (e.g. 
                // S-1-16-0x1000 stands for low integrity level SID). There is one 
                // and only one subauthority.
                IntPtr pIL = NativeMethods.GetSidSubAuthority(tokenIL.Label.Sid, 0);
                IL = Marshal.ReadInt32(pIL);
 
            }
            finally
            {
                // Centralized cleanup for all allocated resources. 
                if (hToken != null)
                {
                    hToken.Close();
                    hToken = null;
                }
                if (pTokenIL != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(pTokenIL);
                    pTokenIL = IntPtr.Zero;
                    cbTokenIL = 0;
                }
            }
 
            return GetILString(IL);
        }
 
        private static string GetILString(Int32 innerIL)
        {
            switch (innerIL)
            {
                case NativeMethods.SECURITY_MANDATORY_UNTRUSTED_RID:
                    return "Untrusted";
                case NativeMethods.SECURITY_MANDATORY_LOW_RID:
                    return "Low";
                case NativeMethods.SECURITY_MANDATORY_MEDIUM_RID:
                    return "Medium";
                case NativeMethods.SECURITY_MANDATORY_HIGH_RID:
                    return "High";
                case NativeMethods.SECURITY_MANDATORY_SYSTEM_RID:
                    return "System";
                default:
                    return "Unknown";
            } 
        }
 
        #endregion

        /// <summary>
        /// The function checks whether the primary access token of the process belongs 
        /// to user account that is a member of the local Administrators group, even if 
        /// it currently is not elevated.
        /// </summary>
        /// <returns>
        /// Returns true if the primary access token of the process belongs to user 
        /// account that is a member of the local Administrators group. Returns false 
        /// if the token does not.
        /// </returns>
        /// <exception cref="System.ComponentModel.Win32Exception">
        /// When any native Windows API call fails, the function throws a Win32Exception 
        /// with the last error code.
        /// </exception>
        internal static bool IsUserInAdminGroup()

 /// <summary>
        /// The function checks whether the current process is run as administrator.
        /// In other words, it dictates whether the primary access token of the 
        /// process belongs to user account that is a member of the local 
        /// Administrators group and it is elevated.
        /// </summary>
        /// <returns>
        /// Returns true if the primary access token of the process belongs to user 
        /// account that is a member of the local Administrators group and it is 
        /// elevated. Returns false if the token does not.
        /// </returns>
        internal static bool IsRunAsAdmin()

  /// <summary>
        /// The function gets the elevation information of the current process. It 
        /// dictates whether the process is elevated or not. Token elevation is only 
        /// available on Windows Vista and newer operating systems, thus 
        /// IsProcessElevated throws a C++ exception if it is called on systems prior 
        /// to Windows Vista. It is not appropriate to use this function to determine 
        /// whether a process is run as administartor.
        /// </summary>
        /// <returns>
        /// Returns true if the process is elevated. Returns false if it is not.
        /// </returns>
        /// <exception cref="System.ComponentModel.Win32Exception">
        /// When any native Windows API call fails, the function throws a Win32Exception 
        /// with the last error code.
        /// </exception>
        /// <remarks>
        /// TOKEN_INFORMATION_CLASS provides TokenElevationType to check the elevation 
        /// type (TokenElevationTypeDefault / TokenElevationTypeLimited / 
        /// TokenElevationTypeFull) of the process. It is different from TokenElevation 
        /// in that, when UAC is turned off, elevation type always returns 
        /// TokenElevationTypeDefault even though the process is elevated (Integrity 
        /// Level == High). In other words, it is not safe to say if the process is 
        /// elevated based on elevation type. Instead, we should use TokenElevation. 
        /// </remarks>
        internal static bool IsProcessElevated()