UIPermission Class

Controls the permissions related to user interfaces and the clipboard. This class cannot be inherited.

Namespace: System.Security.Permissions
Assembly: mscorlib (in mscorlib.dll)

'Declaration
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public NotInheritable Class UIPermission
	Inherits CodeAccessPermission
	Implements IUnrestrictedPermission
'Usage
Dim instance As UIPermission

/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public final class UIPermission extends CodeAccessPermission implements IUnrestrictedPermission
SerializableAttribute 
ComVisibleAttribute(true) 
public final class UIPermission extends CodeAccessPermission implements IUnrestrictedPermission

Drawing and user input events in windows are user interfaces.

The permission to use windows can be one of the following: unrestricted, limited to SafeTopLevelWindows, only SafeSubWindows, or no window drawing or user input event access allowed. SafeTopLevelWindows and SafeSubWindows are restricted in title and size to prevent possible spoofing by potentially harmful code.

The permission to use the clipboard can be one of the following: unrestricted, write-only, or no clipboard access allowed. The paste limitation prevents potentially harmful applications from taking data from the clipboard without the user's consent, while still allowing the cut, copy, and paste operations when initiated by the user through keyboard commands.

Imports System
Imports System.Security
Imports System.Security.Permissions
Imports Microsoft.VisualBasic

<Assembly: CLSCompliant(True)> 

Public Class UIPermissionDemo

    ' The IsSubsetOf method determines whether the current permission is a
    ' subset of the specified permission. This demo uses the IsSubsetOf method
    ' to determine the relationship of two UIPermissionWindow permissions and
    ' two UIPermissionClipboard permissions.
    Private Function IsSubsetOfWindowAndClipboardDemo() As Boolean
        Dim returnValue As Boolean = True
        Dim ui1, ui2 As UIPermissionWindow
        Dim cb1, cb2 As UIPermissionClipboard
        Dim uiIdPerm1, uiIdPerm2 As UIPermission
        Dim uiGen1 As New UIGenerator()
        Dim uiGen2 As New UIGenerator()
        uiGen1.ResetIndex()
        While uiGen1.CreateUI(ui1, cb1)
            uiIdPerm1 = New UIPermission(ui1, cb1)
            uiGen2.ResetIndex()
            Console.WriteLine("********************************************************" & ControlChars.Lf)

            While uiGen2.CreateUI(ui2, cb2)
                uiIdPerm2 = New UIPermission(ui2, cb2)
                Try
                    If uiIdPerm1.IsSubsetOf(uiIdPerm2) Then
                        Console.WriteLine(uiIdPerm1.Window.ToString() & " and " _
                        & uiIdPerm1.Clipboard.ToString() & " is a subset of " _
                        & uiIdPerm2.Window.ToString() & "  and  " & uiIdPerm2.Clipboard.ToString())
                    Else
                        Console.WriteLine(uiIdPerm1.Window.ToString() & " and " _
                        & uiIdPerm1.Clipboard.ToString() & " is not a subset of " _
                        & uiIdPerm2.Window.ToString() & " and " & uiIdPerm2.Clipboard)
                    End If
                Catch e As Exception
                    Console.WriteLine("An exception was thrown  for subset :" & uiIdPerm1.ToString() _
                    & ControlChars.Lf & uiIdPerm2.ToString() & ControlChars.Lf & e.ToString())
                    returnValue = False
                End Try
ContinueWhile2:
            End While
ContinueWhile1:
        End While
        Return returnValue
    End Function 'IsSubsetOfWindowAndClipboardDemo

    ' Compare two UIPemissionWindow permissions.
    Private Function IsSubsetOfWindowDemo() As Boolean
        Dim returnValue As Boolean = True
        Dim ui1, ui2 As UIPermissionWindow
        Dim uiIdPerm1, uiIdPerm2 As UIPermission
        Dim uiGen1 As New UIGenerator()
        Dim uiGen2 As New UIGenerator()
        uiGen1.ResetIndex()
        While uiGen1.CreateUI(ui1)
            uiIdPerm1 = New UIPermission(ui1)
            uiGen2.ResetIndex()
            Console.WriteLine("********************************************************" & ControlChars.Lf)

            While uiGen2.CreateUI(ui2)
                uiIdPerm2 = New UIPermission(ui2)
                Try
                    If uiIdPerm1.IsSubsetOf(uiIdPerm2) Then
                        Console.WriteLine(uiIdPerm1.Window.ToString() & " is a subset of " _
                        & uiIdPerm2.Window.ToString())
                    Else
                        Console.WriteLine(uiIdPerm1.Window.ToString() & " is not a subset of " _
                        & uiIdPerm2.Window.ToString())
                    End If
                Catch e As Exception
                    Console.WriteLine(("An exception was thrown  for subset :" & uiIdPerm1.ToString() _
                    & ControlChars.Lf & uiIdPerm2.ToString() & ControlChars.Lf & e.ToString()))
                    returnValue = False
                End Try
ContinueWhile2:
            End While
ContinueWhile1:
        End While
        Return returnValue
    End Function 'IsSubsetOfWindowDemo

    ' Compare two UIPermissionClipboard permissions.
    Private Function IsSubsetOfClipboardDemo() As Boolean
        Dim returnValue As Boolean = True
        Dim cb1, cb2 As UIPermissionClipboard
        Dim uiIdPerm1, uiIdPerm2 As UIPermission
        Dim uiGen1 As New UIGenerator()
        Dim uiGen2 As New UIGenerator()
        uiGen1.ResetIndex()
        While uiGen1.CreateUI(cb1)
            uiIdPerm1 = New UIPermission(cb1)
            uiGen2.ResetIndex()
            Console.WriteLine("********************************************************" & ControlChars.Lf)

            While uiGen2.CreateUI(cb2)
                uiIdPerm2 = New UIPermission(cb2)
                Try
                    If uiIdPerm1.IsSubsetOf(uiIdPerm2) Then
                        Console.WriteLine(uiIdPerm1.Clipboard.ToString() & " is a subset of " _
                        & uiIdPerm2.Clipboard.ToString())
                    Else
                        Console.WriteLine(uiIdPerm1.Clipboard.ToString() & " is not a subset of " _
                        & uiIdPerm2.Clipboard.ToString())
                    End If
                Catch e As Exception
                    Console.WriteLine("An exception was thrown  for subset :" _
                    & uiIdPerm1.ToString() & ControlChars.Lf & uiIdPerm2.ToString() _
                    & ControlChars.Lf & e.ToString())
                    returnValue = False
                End Try
ContinueWhile2:
            End While
ContinueWhile1:
        End While
        Return returnValue
    End Function 'IsSubsetOfClipboardDemo


    ' Union creates a new permission that is the union of the current permission and the specified permission.
    Private Function UnionDemo() As Boolean
        Dim returnValue As Boolean = True
        Dim ui1, ui2 As UIPermissionWindow
        Dim cb1, cb2 As UIPermissionClipboard
        Dim uiIdPerm1, uiIdPerm2 As UIPermission
        Dim uiIdPerm3 As IPermission
        Dim uiGen1 As New UIGenerator()
        Dim uiGen2 As New UIGenerator()
        uiGen1.ResetIndex()
        While uiGen1.CreateUI(ui1, cb1)
            uiIdPerm1 = New UIPermission(ui1, cb1)
            Console.WriteLine("**********************************************************" & ControlChars.Lf)
            uiGen2.ResetIndex()

            While uiGen2.CreateUI(ui2, cb2)
                uiIdPerm2 = New UIPermission(ui2, cb2)
                uiIdPerm3 = CType(uiIdPerm1.Union(uiIdPerm2), UIPermission)
                uiIdPerm3 = uiIdPerm1.Union(uiIdPerm2)

                If uiIdPerm3 Is Nothing Then
                    Console.WriteLine(("The union of " & ui1.ToString() & " and " & ui2.ToString() & " is null."))
                Else
                    Console.WriteLine(("The union of " & uiIdPerm1.Window.ToString() & " and " _
                    & uiIdPerm1.Clipboard.ToString() & " with " & uiIdPerm2.Window.ToString() _
                    & " and " & uiIdPerm2.Clipboard.ToString() & " = " & ControlChars.Lf _
                    & ControlChars.Tab & CType(uiIdPerm3, UIPermission).Window.ToString() & " and " _
                    & CType(uiIdPerm3, UIPermission).Clipboard.ToString()))
                End If
ContinueWhile2:
            End While
ContinueWhile1:
        End While


        Return returnValue
    End Function

    ' Intersect creates and returns a new permission that is the intersection of the current 
    ' permission and the permission specified.
    Private Function IntersectDemo() As Boolean
        Dim returnValue As Boolean = True
        Dim ui1, ui2 As UIPermissionWindow
        Dim cb1, cb2 As UIPermissionClipboard
        Dim uiIdPerm1, uiIdPerm2, uiIdPerm3 As UIPermission
        Dim uiGen1 As New UIGenerator()
        Dim uiGen2 As New UIGenerator()
        uiGen1.ResetIndex()
        While uiGen1.CreateUI(ui1, cb1)
            uiIdPerm1 = New UIPermission(ui1, cb1)
            Console.WriteLine("**********************************************************" & ControlChars.Lf)
            uiGen2.ResetIndex()

            While uiGen2.CreateUI(ui2, cb2)
                uiIdPerm2 = New UIPermission(ui2, cb2)
                uiIdPerm3 = CType(uiIdPerm1.Intersect(uiIdPerm2), UIPermission)
                If Not (uiIdPerm3 Is Nothing) Then
                    Console.WriteLine(("The intersection of " & uiIdPerm1.Window.ToString() & " and " _
                    & uiIdPerm1.Clipboard.ToString() & " with " & uiIdPerm2.Window.ToString() _
                    & " and " & uiIdPerm2.Clipboard.ToString() & " = " & ControlChars.Lf _
                    & ControlChars.Tab & CType(uiIdPerm3, UIPermission).Window.ToString() & " and " _
                    & CType(uiIdPerm3, UIPermission).Clipboard.ToString()))
                Else
                    Console.WriteLine(("The intersection of " & ui1.ToString() & " and " & cb1.ToString() _
                    & " with " & ui2.ToString() & " and " & cb2.ToString() & " is null."))
                End If
ContinueWhile2:
            End While
ContinueWhile1:
        End While

        Return returnValue
    End Function 'IntersectDemo


    'Copy creates and returns an identical copy of the current permission.
    Private Function CopyDemo() As Boolean
        Dim returnValue As Boolean = True

        Dim ui1 As UIPermissionWindow
        Dim cb1 As UIPermissionClipboard
        Dim uiIdPerm1, uiIdPerm2 As UIPermission

        Dim uiGen1 As New UIGenerator()
        Dim uiGen2 As New UIGenerator()

        uiGen1.ResetIndex()
        While uiGen1.CreateUI(ui1, cb1)
            uiIdPerm1 = New UIPermission(ui1, cb1)
            uiGen2.ResetIndex()
            Console.WriteLine("********************************************************" & ControlChars.Lf)
            Try
                uiIdPerm2 = CType(uiIdPerm1.Copy(), UIPermission)
                Console.WriteLine(("Result of copy = " & uiIdPerm2.ToString()))

            Catch e As Exception
                Console.WriteLine(("The copy failed :" & uiIdPerm1.ToString() & e.ToString()))
                GoTo ContinueWhile1
            End Try
ContinueWhile1:
        End While
        Return returnValue
    End Function 'CopyDemo


    ' ToXml creates an XML encoding of the permission and its current state; 
    ' FromXml reconstructs a permission with the specified state from the XML encoding. 
    Private Function ToFromXmlDemo() As Boolean
        Dim returnValue As Boolean = True

        Dim ui1 As UIPermissionWindow
        Dim cb1 As UIPermissionClipboard
        Dim uiIdPerm1, uiIdPerm2 As UIPermission
        Dim uiGen1 As New UIGenerator()
        Dim uiGen2 As New UIGenerator()
        uiGen1.ResetIndex()
        While uiGen1.CreateUI(ui1, cb1)
            uiIdPerm1 = New UIPermission(ui1, cb1)
            Console.WriteLine("********************************************************" & ControlChars.Lf)
            uiGen2.ResetIndex()
            Try
                uiIdPerm2 = New UIPermission(PermissionState.None)
                uiIdPerm2.FromXml(uiIdPerm1.ToXml())
                Console.WriteLine(("Result of ToFromXml = " & uiIdPerm2.ToString()))

            Catch e As Exception
                Console.WriteLine(("ToFromXml failed :" & uiIdPerm1.ToString() & e.ToString()))
                GoTo ContinueWhile1
            End Try
ContinueWhile1:
        End While

        Return returnValue
    End Function 'ToFromXmlDemo

    ' Invoke all demos.
    Public Function runDemo() As Boolean
        Dim returnCode As Boolean = True
        Dim tempReturnCode As Boolean

        ' Call the IsSubsetOfClipboard demo.
        tempReturnCode = IsSubsetOfClipboardDemo()
        If tempReturnCode Then
            Console.Out.WriteLine("IsSubsetOfClipboard demo completed successfully.")
        Else
            Console.Out.WriteLine("IsSubsetOfClipboard demo failed")
        End If
        returnCode = tempReturnCode AndAlso returnCode

        ' Call the IsSubsetOfWindow demo.
        tempReturnCode = IsSubsetOfWindowDemo()
        If tempReturnCode Then
            Console.Out.WriteLine("IsSubsetOfWindow demo completed successfully.")
        Else
            Console.Out.WriteLine("IsSubsetOfWindow demo failed")
        End If
        returnCode = tempReturnCode AndAlso returnCode

        ' Call the IsSubsetOfWindowAndClipboard demo.
        tempReturnCode = IsSubsetOfWindowAndClipboardDemo()
        If tempReturnCode Then
            Console.Out.WriteLine("IsSubsetOfWindowAndClipboard demo completed successfully.")
        Else
            Console.Out.WriteLine("IsSubsetOfWindowAndClipboard demo failed")
        End If
        returnCode = tempReturnCode AndAlso returnCode

        ' Call the Union demo.
        tempReturnCode = UnionDemo()
        If tempReturnCode Then
            Console.Out.WriteLine("Union demo completed successfully.")
        Else
            Console.Out.WriteLine("Union demo failed.")
        End If
        returnCode = tempReturnCode AndAlso returnCode

        ' Call the Intersect demo.	
        tempReturnCode = IntersectDemo()
        If tempReturnCode Then
            Console.Out.WriteLine("Intersect demo completed successfully. ")
        Else
            Console.Out.WriteLine("Intersect demo failed.")
        End If
        returnCode = tempReturnCode AndAlso returnCode


        ' Call the Copy demo.	
        tempReturnCode = CopyDemo()
        If tempReturnCode Then
            Console.Out.WriteLine("Copy demo completed successfully.")
        Else
            Console.Out.WriteLine("Copy demo failed.")
        End If
        returnCode = tempReturnCode AndAlso returnCode

        ' Call the ToFromXml demo.	
        tempReturnCode = ToFromXmlDemo()
        If tempReturnCode Then
            Console.Out.WriteLine("ToFromXml demo completed successfully.")
        Else
            Console.Out.WriteLine("ToFromXml demo failed.")
        End If
        returnCode = tempReturnCode AndAlso returnCode

        Return returnCode
    End Function 'runDemo

    ' Test harness.
    Public Overloads Shared Sub Main(ByVal args() As [String])
        Try
            Dim democase As New UIPermissionDemo()
            Dim returnCode As Boolean = democase.runDemo()
            If returnCode Then
                Console.Out.WriteLine("UIPermission demo completed successfully.")
                Console.Out.WriteLine("Press the Enter key to exit.")
                Dim consoleInput As String = Console.ReadLine()
                System.Environment.ExitCode = 100
            Else
                Console.Out.WriteLine("UIPermission demo failed.")
                Console.Out.WriteLine("Press the Enter key to exit.")
                Dim consoleInput As String = Console.ReadLine()
                System.Environment.ExitCode = 101
            End If
        Catch e As Exception
            Console.Out.WriteLine("UIPermission demo failed")
            Console.WriteLine(e.ToString())
            Console.Out.WriteLine("Press the Enter key to exit.")
            Dim consoleInput As String = Console.ReadLine()
            System.Environment.ExitCode = 101
        End Try
    End Sub 'Main
End Class 'UIPermissionDemo


' This class generates UIPermission objects.

Friend Class UIGenerator
    Private myUI As UIPermissionWindow() = {UIPermissionWindow.AllWindows, UIPermissionWindow.SafeSubWindows, UIPermissionWindow.SafeTopLevelWindows, UIPermissionWindow.NoWindows}
    Private myCB As UIPermissionClipboard() = {UIPermissionClipboard.AllClipboard, UIPermissionClipboard.OwnClipboard, UIPermissionClipboard.NoClipboard}

    Private uiIndex As Integer = 0
    Private cbIndex As Integer = 0


    Public Sub New()
        ResetIndex()
    End Sub 'New


    Public Sub ResetIndex()
        uiIndex = 0
        cbIndex = 0
    End Sub 'ResetIndex

    Public Sub ResetUIIndex()
        uiIndex = 0
    End Sub 'ResetUIIndex

    ' Create a UIPermission object using both a UIPermission Window enumeration and a 
    ' UIPermissionClipboard enumeration to specify permissions.
    Public Overloads Function CreateUI(ByRef ui As UIPermissionWindow, ByRef cb As UIPermissionClipboard) As Boolean

        If uiIndex >= myUI.Length AndAlso cbIndex >= myCB.Length - 1 Then
            ui = UIPermissionWindow.NoWindows
            cb = UIPermissionClipboard.NoClipboard
            Return False
        End If

        If uiIndex >= myUI.Length AndAlso cbIndex < myCB.Length - 1 Then
            ResetUIIndex()
            ui = myUI(uiIndex)
            uiIndex = uiIndex + 1
            cbIndex = cbIndex + 1
            cb = myCB(cbIndex)
            Return True
        End If

        ui = myUI(uiIndex)
        uiIndex = uiIndex + 1
        cb = myCB(cbIndex)
        Return True
    End Function 'CreateUI


    ' Create a UIPermission using the specified UIPermissionWindow enumeration 
    ' to set Window permissions.
    Public Overloads Function CreateUI(ByRef ui As UIPermissionWindow) As Boolean

        If uiIndex >= myUI.Length Then

            ui = UIPermissionWindow.NoWindows
            Return False
        End If
        ui = myUI(uiIndex)
        uiIndex = uiIndex + 1
        Return True
        
    End Function 'CreateUI


    ' Create a UIPermission using  Create a UIPermission using the specified UIPermissionClipboard enumeration to set Clipboard permissions.
    Public Overloads Function CreateUI(ByRef cb As UIPermissionClipboard) As Boolean

        If cbIndex >= myCB.Length Then
            cb = UIPermissionClipboard.NoClipboard
            Return False
        End If

        cb = myCB(cbIndex)
        cbIndex = cbIndex + 1
        Return True
        
    End Function
End Class

// This sample demonstrates the IsSubsetOf, Union, Intersect, Copy, 
// ToXml and FromXml methods
// of the UIPermission class.

import System.* ;
import System.Security.* ;
import System.Security.Permissions.*;

/** @assembly CLSCompliant(true)
 */

public class UIPermissionDemo
{
    // The IsSubsetOf method determines whether the current permission is 
    // a subset of the specified permission.
    // This demo uses the IsSubsetOf method to determine the relationship 
    // of two UIPermissionWindow permissions and two UIPermissionClipboard 
    // permissions.
    private boolean IsSubsetOfWindowAndClipboardDemo()
    {
        boolean returnValue = true;
        UIPermissionWindow ui1[] = new UIPermissionWindow[1];
        UIPermissionWindow ui2[] = new UIPermissionWindow[1];
        UIPermissionClipboard cb1[] = new UIPermissionClipboard[1];
        UIPermissionClipboard cb2[] = new UIPermissionClipboard[1];
        UIPermission uiIdPerm1[] = new UIPermission[1];
        UIPermission uiIdPerm2[] = new UIPermission[1];
        UIGenerator uiGen1 = new UIGenerator();
        UIGenerator uiGen2 = new UIGenerator();

        uiGen1.ResetIndex();
        while (uiGen1.CreateUI(uiIdPerm1, ui1, cb1)) {
            if (uiIdPerm1[0] == null) {
                continue;
            }
            uiGen2.ResetIndex();
            Console.WriteLine("**************************************" 
                + "******************\n");
            while (uiGen2.CreateUI(uiIdPerm2, ui2, cb2)) {
                if (uiIdPerm2[0] == null) {
                    continue;
                }
                try    {
                    if (uiIdPerm1[0].IsSubsetOf(uiIdPerm2[0])) {
                        Console.WriteLine((uiIdPerm1[0].get_Window() 
                            + " and " + uiIdPerm1[0].get_Clipboard() 
                            + " is a subset of " + uiIdPerm2[0].get_Window() 
                            + " and " + uiIdPerm2[0].get_Clipboard()));
                    }
                    else {
                        Console.WriteLine((uiIdPerm1[0].get_Window() 
                        + " and " + uiIdPerm1[0].get_Clipboard() 
                        + " is not a subset of " + uiIdPerm2[0].get_Window() 
                        + " and " + uiIdPerm2[0].get_Clipboard()));
                    }
                }
                catch (System.Exception e) {
                    Console.WriteLine(("An exception was " 
                        + "thrown for subset :" 
                        + uiIdPerm1[0] + "\n" + uiIdPerm2[0] + "\n" + e));
                    returnValue = false;
                }
            }
        }
        return returnValue;
    } //IsSubsetOfWindowAndClipboardDemo

    // Compare two UIPemissionWindow permissions.
    private boolean IsSubsetOfWindowDemo()
    {
        boolean returnValue = true;
        UIPermissionWindow ui1[] = new UIPermissionWindow[1];
        UIPermissionWindow ui2[] = new UIPermissionWindow[1];
        UIPermission uiIdPerm1[] = new UIPermission[1];
        UIPermission uiIdPerm2[] = new UIPermission[1];
        UIGenerator uiGen1 = new UIGenerator();
        UIGenerator uiGen2 = new UIGenerator();

        uiGen1.ResetIndex();
        while (uiGen1.CreateUI(uiIdPerm1, ui1)) {
            if (uiIdPerm1[0] == null) {
                continue;
            }
            uiGen2.ResetIndex();
            Console.WriteLine("********************************" 
                + "************************\n");
            while (uiGen2.CreateUI(uiIdPerm2, ui2)) {
                if (uiIdPerm2[0] == null) {
                    continue;
                }
                try {
                    if (uiIdPerm1[0].IsSubsetOf(uiIdPerm2[0])) {
                        Console.WriteLine((uiIdPerm1[0].get_Window() 
                            + " is a subset of " + uiIdPerm2[0].get_Window()));
                    }
                    else {
                        Console.WriteLine((uiIdPerm1[0].get_Window() 
                            + " is not a subset of " 
                            + uiIdPerm2[0].get_Window()));
                    }
                }
                catch (System.Exception e) {
                    Console.WriteLine(("An exception was " 
                        + "thrown for subset :" + uiIdPerm1[0] 
                        + "\n" + uiIdPerm2[0] + "\n" + e));
                    returnValue = false;
                }
            }
        }
        return returnValue;
    } //IsSubsetOfWindowDemo

    // Compare two UIPermissionClipboard permissions.
    private boolean IsSubsetOfClipboardDemo()
    {
        boolean returnValue = true;
        UIPermissionClipboard cb1[] = new UIPermissionClipboard[1];
        UIPermissionClipboard cb2[] = new UIPermissionClipboard[1];
        UIPermission uiIdPerm1[] = new UIPermission[1];
        UIPermission uiIdPerm2[] = new UIPermission[1];
        UIGenerator uiGen1 = new UIGenerator();
        UIGenerator uiGen2 = new UIGenerator();

        uiGen1.ResetIndex();
        while (uiGen1.CreateUI(uiIdPerm1, cb1)) {
            if (uiIdPerm1[0] == null) {
                continue;
            }
            uiGen2.ResetIndex();
            Console.WriteLine("********************************" 
                + "************************\n");
            while (uiGen2.CreateUI(uiIdPerm2, cb2)) {
                if (uiIdPerm2[0] == null) {
                    continue;
                }
                try {
                    if (uiIdPerm1[0].IsSubsetOf(uiIdPerm2[0])) {
                        Console.WriteLine((uiIdPerm1[0].get_Clipboard() 
                            + " is a subset of " 
                            + uiIdPerm2[0].get_Clipboard()));
                    }
                    else {
                        Console.WriteLine((uiIdPerm1[0].get_Clipboard() 
                            + " is not a subset of " 
                            + uiIdPerm2[0].get_Clipboard()));
                    }
                }
                catch (System.Exception e) {
                    Console.WriteLine(("An exception was thrown " 
                        + "for subset :" + uiIdPerm1[0] + "\n" 
                        + uiIdPerm2[0] + "\n" + e));
                    returnValue = false;
                }
            }
        }
        return returnValue;
    } //IsSubsetOfClipboardDemo

    // Union creates a new permission that is the union of the current 
    // permission and the specified permission.
    private boolean UnionDemo()
    {
        boolean returnValue = true;
        UIPermissionWindow ui1[] = new UIPermissionWindow[1];
        UIPermissionWindow ui2[] = new UIPermissionWindow[1];
        UIPermissionClipboard cb1[] = new UIPermissionClipboard[1];
        UIPermissionClipboard cb2[] = new UIPermissionClipboard[1];
        UIPermission uiIdPerm1[] = new UIPermission[1];
        UIPermission uiIdPerm2[] = new UIPermission[1];
        IPermission uiIdPerm3;
        UIGenerator uiGen1 = new UIGenerator();
        UIGenerator uiGen2 = new UIGenerator();

        uiGen1.ResetIndex();
        while (uiGen1.CreateUI(uiIdPerm1, ui1, cb1)) {
            if (uiIdPerm1[0] == null) {
                continue;
            }
            Console.WriteLine("*************************************" 
                + "*********************\n");
            uiGen2.ResetIndex();
            while (uiGen2.CreateUI(uiIdPerm2, ui2, cb2)) {
                if (uiIdPerm2[0] == null) {
                    continue;
                }
                uiIdPerm3 = ((UIPermission)(uiIdPerm1[0].Union(uiIdPerm2[0])));
                uiIdPerm3 = uiIdPerm1[0].Union(uiIdPerm2[0]);
                if (uiIdPerm3 == null) {
                    Console.WriteLine(("The union of " + ui1[0] + " and " 
                        + ui2[0] + " is null."));
                }
                else {
                    Console.WriteLine(("The union of " 
                        + uiIdPerm1[0].get_Window() + " and " 
                        + uiIdPerm1[0].get_Clipboard() + " with " 
                        + uiIdPerm2[0].get_Window() + " and " 
                        + uiIdPerm2[0].get_Clipboard() + " = \n\t" 
                        + ((UIPermission)(uiIdPerm3)).get_Window().ToString() 
                        + " and " + ((UIPermission)(uiIdPerm3)).get_Clipboard().
                        ToString()));
                }
            }
        }
        return returnValue;
    } //UnionDemo

    // Intersect creates and returns a new permission that is the 
    // intersection of the current permission and the permission specified.
    private boolean IntersectDemo()
    {
        boolean returnValue = true;
        UIPermissionWindow ui1[] = new UIPermissionWindow[1];
        UIPermissionWindow ui2[] = new UIPermissionWindow[1];
        UIPermissionClipboard cb1[] = new UIPermissionClipboard[1];
        UIPermissionClipboard cb2[] = new UIPermissionClipboard[1];
        UIPermission uiIdPerm1[] = new UIPermission[1];
        UIPermission uiIdPerm2[] = new UIPermission[1];
        UIPermission uiIdPerm3 = null;
        UIGenerator uiGen1 = new UIGenerator();
        UIGenerator uiGen2 = new UIGenerator();

        uiGen1.ResetIndex();
        while (uiGen1.CreateUI(uiIdPerm1, ui1, cb1)) {
            if (uiIdPerm1[0] == null) {
                continue;
            }
            Console.WriteLine("************************************" 
                + "**********************\n");
            uiGen2.ResetIndex();
            while (uiGen2.CreateUI(uiIdPerm2, ui2, cb2)) {
                if (uiIdPerm2[0] == null) {
                    continue;
                }
                uiIdPerm3 = 
                    ((UIPermission)(uiIdPerm1[0].Intersect(uiIdPerm2[0])));
                if (uiIdPerm3 != null) {
                    Console.WriteLine(("The intersection of " 
                        + uiIdPerm1[0].get_Window() + " and " 
                        + uiIdPerm1[0].get_Clipboard() + " with " 
                        + uiIdPerm2[0].get_Window() + " and " 
                        + uiIdPerm2[0].get_Clipboard() + " = \n\t" 
                        + ((UIPermission)(uiIdPerm3)).get_Window().ToString() 
                        + " and " + ((UIPermission)(uiIdPerm3)).get_Clipboard().
                        ToString()));
                }
                else {
                    Console.WriteLine(("The intersection of " 
                        + ui1[0] + " and " + cb1[0] + " with " + ui2[0] 
                        + " and " + cb2[0] + " is null."));
                }
            }
        }
        return returnValue;
    } //IntersectDemo

    //Copy creates and returns an identical copy of the current permission.
    private boolean CopyDemo()
    {
        boolean returnValue = true;
        UIPermissionWindow ui1[] = new UIPermissionWindow[1];
        UIPermissionClipboard cb1[] = new UIPermissionClipboard[1];
        UIPermission uiIdPerm1[] = new UIPermission[1];
        UIPermission uiIdPerm2 = null;
        UIGenerator uiGen1 = new UIGenerator();
        UIGenerator uiGen2 = new UIGenerator();

        uiGen1.ResetIndex();
        while (uiGen1.CreateUI(uiIdPerm1, ui1, cb1)) {
            if (uiIdPerm1[0] == null) {
                continue;
            }
            uiGen2.ResetIndex();
            Console.WriteLine("**********************************" 
                + "**********************\n");
            try {
                uiIdPerm2 = ((UIPermission)(uiIdPerm1[0].Copy()));
                Console.WriteLine(("Result of copy = " 
                    + uiIdPerm2.ToString()));
            catch (System.Exception e) {
                Console.WriteLine(("The copy failed :" 
                    + uiIdPerm1[0].ToString() + e));
                continue;
            }
        }
        return returnValue;
    } //CopyDemo

    // ToXml creates an XML encoding of the permission and its current state;
    // FromXml reconstructs a permission with the specified state from the 
    // XML encoding.
    private boolean ToFromXmlDemo()
    {
        boolean returnValue = true;
        UIPermissionWindow ui1[] = new UIPermissionWindow[1];
        UIPermissionClipboard cb1[] = new UIPermissionClipboard[1];
        UIPermission uiIdPerm1[] = new UIPermission[1];
        UIPermission uiIdPerm2 = null;
        UIGenerator uiGen1 = new UIGenerator();
        UIGenerator uiGen2 = new UIGenerator();

        uiGen1.ResetIndex();
        while (uiGen1.CreateUI(uiIdPerm1, ui1, cb1)) {
            if (uiIdPerm1 == null) {
                continue;
            }
            Console.WriteLine("*************************************" 
                + "*******************\n");
            uiGen2.ResetIndex();
            try {
                uiIdPerm2 = new UIPermission(PermissionState.None);
                uiIdPerm2.FromXml(uiIdPerm1[0].ToXml());
                Console.WriteLine(("Result of ToFromXml = " 
                    + uiIdPerm2.ToString()));
            }
            catch (System.Exception e) {
                Console.WriteLine(("ToFromXml failed :" 
                    + uiIdPerm1[0].ToString() + e));
                continue;
            }
        }
        return returnValue;
    } //ToFromXmlDemo

    // Invoke all demos.
    public boolean runDemo()
    {
        boolean returnCode = true;
        boolean tempReturnCode;

        // Call the IsSubsetOfClipboard demo.
        if (tempReturnCode = IsSubsetOfClipboardDemo()) {
            Console.get_Out().WriteLine("IsSubsetOfClipboard demo " 
                + "completed successfully.");
        }
        else {
            Console.get_Out().WriteLine("IsSubsetOfClipboard demo failed");
        }
        returnCode = tempReturnCode && returnCode;
        // Call the IsSubsetOfWindow demo.
        if (tempReturnCode = IsSubsetOfWindowDemo()) {
            Console.get_Out().WriteLine("IsSubsetOfWindow demo " 
                + "completed successfully.");
        }
        else {
            Console.get_Out().WriteLine("IsSubsetOfWindow demo failed");
        }
        returnCode = tempReturnCode && returnCode;

        // Call the IsSubsetOfWindowAndClipboard demo.
        if (tempReturnCode = IsSubsetOfWindowAndClipboardDemo()) {
            Console.get_Out().WriteLine("IsSubsetOfWindowAndClipboard " 
                + "demo completed successfully.");
        }
        else {
            Console.get_Out().WriteLine("IsSubsetOfWindowAndClipboard " 
                + "demo failed");
        }
        returnCode = tempReturnCode && returnCode;

        // Call the Union demo.
        if (tempReturnCode = UnionDemo()) {
            Console.get_Out().WriteLine("Union demo completed successfully.");
        }
        else {
            Console.get_Out().WriteLine("Union demo failed.");
        }

        returnCode = tempReturnCode && returnCode;

        // Call the Intersect demo.
        if (tempReturnCode = IntersectDemo()) {
            Console.get_Out().WriteLine("Intersect demo completed " 
                + "successfully. ");
        }
        else {
            Console.get_Out().WriteLine("Intersect demo failed.");
        }

        returnCode = tempReturnCode && returnCode;

        // Call the Copy demo.
        if (tempReturnCode = CopyDemo()) {
            Console.get_Out().WriteLine("Copy demo completed successfully.");
        }
        else {
            Console.get_Out().WriteLine("Copy demo failed.");
        }

        returnCode = tempReturnCode && returnCode;

        // Call the ToFromXml demo.
        if (tempReturnCode = ToFromXmlDemo()) {
            Console.get_Out().WriteLine("ToFromXml demo completed " 
                + "successfully.");
        }
        else {
            Console.get_Out().WriteLine("ToFromXml demo failed.");
        }
        returnCode = tempReturnCode && returnCode;
        return returnCode;
    } //runDemo

    // Test harness.
    public static void main(String[] args)
    {
        try {
            UIPermissionDemo democase = new UIPermissionDemo();
            boolean returnCode = democase.runDemo();
            if (returnCode) {
                Console.get_Out().WriteLine(
                "UIPermission demo completed successfully.");
                Console.get_Out().WriteLine("Press the Enter key to exit.");
                String consoleInput = Console.ReadLine();
                Environment.set_ExitCode(100);
            }
            else {
                Console.get_Out().WriteLine("UIPermission demo failed.");
                Console.get_Out().WriteLine("Press the Enter key to exit.");
                String consoleInput = Console.ReadLine();
                Environment.set_ExitCode(101);
            }
        }
        catch (System.Exception e) {
            Console.get_Out().WriteLine("UIPermission demo failed");
            Console.WriteLine(e.ToString());
            Console.get_Out().WriteLine("Press the Enter key to exit.");
            String consoleInput = Console.ReadLine();
            Environment.set_ExitCode(101);
        }
    } //main
} //UIPermissionDemo

// This class generates UIPermission objects.
class UIGenerator
{
    private UIPermissionWindow myUI[] =  { 
        UIPermissionWindow.AllWindows, 
        UIPermissionWindow.SafeSubWindows, 
        UIPermissionWindow.SafeTopLevelWindows, 
        UIPermissionWindow.NoWindows};

    private UIPermissionClipboard myCB[] =  { 
        UIPermissionClipboard.AllClipboard, 
        UIPermissionClipboard.OwnClipboard, 
        UIPermissionClipboard.NoClipboard};

    private int uiIndex = 0;
    private int cbIndex = 0;

    public UIGenerator()
    {
        ResetIndex();
    } //UIGenerator

    public void ResetIndex()
    {
        uiIndex = 0;
        cbIndex = 0;
    } //ResetIndex

    public void ResetUIIndex()
    {
        uiIndex = 0;
    } //ResetUIIndex

    // Create a UIPermission object using both a UIPermission Window 
    // enumeration and a UIPermissionClipboard enumeration to specify 
    // permissions.
    public boolean CreateUI(UIPermission uiPerm[], UIPermissionWindow ui[], 
        UIPermissionClipboard cb[])
    {
        if (uiIndex >= myUI.length && cbIndex >= myCB.length - 1) {
            ui[0] = UIPermissionWindow.NoWindows;
            cb[0] = UIPermissionClipboard.NoClipboard;
            uiPerm[0] = new UIPermission(ui[0], cb[0]);
            return false;
        }
        if (uiIndex >= myUI.length && cbIndex < myCB.length - 1) {
            ResetUIIndex();
            ui[0] = myUI[uiIndex++];
            cb[0] = myCB[++cbIndex];
            uiPerm[0] = new UIPermission(ui[0], cb[0]);
            return true;
        }
        ui[0] = myUI[uiIndex++];
        cb[0] = myCB[cbIndex];
        try {
            uiPerm[0] = new UIPermission(ui[0], cb[0]);
            return true;
        }
        catch (System.Exception e) {
            Console.WriteLine(("Cannot create UIPermission: " 
                + ui + " " + e));
            uiPerm[0] = new UIPermission(PermissionState.None);
            ui[0] = UIPermissionWindow.NoWindows;
            return true;
        }
    }

    // Create a UIPermission using Create a UIPermission using the 
    // specified UIPermissionWindow enumeration to set Window permissions.
    public boolean CreateUI(UIPermission uiPerm[], UIPermissionWindow ui[])
    {
        if (uiIndex >= myUI.length) {
            uiPerm[0] = new UIPermission(PermissionState.None);

            ui[0] = UIPermissionWindow.NoWindows;
            return false;
        }
        ui[0] = myUI[uiIndex++];

        try {
            uiPerm[0] = new UIPermission(ui[0]);
            return true;
        }
        catch (System.Exception e) {
            Console.WriteLine(("Cannot create UIPermission: " 
            + ui[0] + " " + e));
            uiPerm[0] = new UIPermission(PermissionState.None);
            ui[0] = UIPermissionWindow.NoWindows;
            return true;
        }
    } //CreateUI

    // Create a UIPermission using the specified UIPermissionClipboard 
    // enumeration to set Clipboard permissions.
    public boolean CreateUI(UIPermission uiPerm[], 
        UIPermissionClipboard cb[])
    {
        if (cbIndex >= myCB.length) {
            uiPerm[0] = new UIPermission(PermissionState.None);
            cb[0] = UIPermissionClipboard.NoClipboard;
            return false;
        }
        cb[0] = myCB[cbIndex++];
        try {
            uiPerm[0] = new UIPermission(cb[0]);
            return true;
        }
        catch (System.Exception e) {
            Console.WriteLine(("Cannot create UIPermission: " 
                + cb[0] + " " + e));
            uiPerm[0] = new UIPermission(PermissionState.None);
            cb[0] = UIPermissionClipboard.NoClipboard;
            return true;
        }
    } //CreateUI
} //UIGenerator

System.Object
   System.Security.CodeAccessPermission
    System.Security.Permissions.UIPermission

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

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