Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / WinFormsSecurity.cs / 1305376 / WinFormsSecurity.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Diagnostics; using System.Diagnostics.CodeAnalysis; using System; using System.IO; using System.Security.Permissions; using System.Security; using System.Drawing.Printing; using System.Runtime.Versioning; internal static class IntSecurity { public static readonly TraceSwitch SecurityDemand = new TraceSwitch("SecurityDemand", "Trace when security demands occur."); #if DEBUG public static readonly BooleanSwitch MapSafeTopLevelToSafeSub = new BooleanSwitch("MapSafeTopLevelToSafeSub", "Maps the SafeTopLevelWindow UI permission to SafeSubWindow permission. Must restart to take effect."); #endif private static CodeAccessPermission adjustCursorClip; private static CodeAccessPermission affectMachineState; private static CodeAccessPermission affectThreadBehavior; private static CodeAccessPermission allPrinting; private static PermissionSet allPrintingAndUnmanagedCode; // Can't assert twice in the same method private static CodeAccessPermission allWindows; private static CodeAccessPermission clipboardRead; private static CodeAccessPermission clipboardOwn; private static PermissionSet clipboardWrite; // Can't assert twice in the same method private static CodeAccessPermission changeWindowRegionForTopLevel; private static CodeAccessPermission controlFromHandleOrLocation; private static CodeAccessPermission createAnyWindow; private static CodeAccessPermission createGraphicsForControl; private static CodeAccessPermission defaultPrinting; private static CodeAccessPermission fileDialogCustomization; private static CodeAccessPermission fileDialogOpenFile; private static CodeAccessPermission fileDialogSaveFile; private static CodeAccessPermission getCapture; private static CodeAccessPermission getParent; private static CodeAccessPermission manipulateWndProcAndHandles; private static CodeAccessPermission modifyCursor; private static CodeAccessPermission modifyFocus; private static CodeAccessPermission objectFromWin32Handle; private static CodeAccessPermission safePrinting; private static CodeAccessPermission safeSubWindows; private static CodeAccessPermission safeTopLevelWindows; private static CodeAccessPermission sendMessages; private static CodeAccessPermission sensitiveSystemInformation; private static CodeAccessPermission transparentWindows; private static CodeAccessPermission topLevelWindow; private static CodeAccessPermission unmanagedCode; private static CodeAccessPermission unrestrictedWindows; private static CodeAccessPermission windowAdornmentModification; /* Unused permissions private static CodeAccessPermission win32HandleManipulation; private static CodeAccessPermission minimizeWindowProgrammatically; private static CodeAccessPermission restrictedWebBrowserPermission; private static CodeAccessPermission noPrinting; private static CodeAccessPermission topMostWindow; private static CodeAccessPermission unrestrictedEnvironment; private static CodeAccessPermission autoComplete; private static CodeAccessPermission defaultWebBrowserPermission; private static CodeAccessPermission screenDC; */ // // Property accessors for permissions. Don't allocate permissions up front -- always // demand create them. A great many codepaths never need all these permissions so it is wasteful to // create them. // public static CodeAccessPermission AdjustCursorClip { get { if (adjustCursorClip == null) { adjustCursorClip = AllWindows; } return adjustCursorClip; } } public static CodeAccessPermission AdjustCursorPosition { get { return AllWindows; } } public static CodeAccessPermission AffectMachineState { get { if (affectMachineState == null) { affectMachineState = UnmanagedCode; } return affectMachineState; } } public static CodeAccessPermission AffectThreadBehavior { get { if (affectThreadBehavior == null) { affectThreadBehavior = UnmanagedCode; } return affectThreadBehavior; } } public static CodeAccessPermission AllPrinting { get { if (allPrinting == null) { allPrinting = new PrintingPermission(PrintingPermissionLevel.AllPrinting); } return allPrinting; } } public static PermissionSet AllPrintingAndUnmanagedCode { // Can't assert twice in the same method. See ASURT 52788. get { if (allPrintingAndUnmanagedCode == null) { PermissionSet temp = new PermissionSet(PermissionState.None); temp.SetPermission(IntSecurity.UnmanagedCode); temp.SetPermission(IntSecurity.AllPrinting); allPrintingAndUnmanagedCode = temp; } return allPrintingAndUnmanagedCode; } } public static CodeAccessPermission AllWindows { get { if (allWindows == null) { allWindows = new UIPermission(UIPermissionWindow.AllWindows); } return allWindows; } } public static CodeAccessPermission ClipboardRead { get { if (clipboardRead == null) { clipboardRead = new UIPermission(UIPermissionClipboard.AllClipboard); } return clipboardRead; } } public static CodeAccessPermission ClipboardOwn { get { if (clipboardOwn == null) { clipboardOwn = new UIPermission(UIPermissionClipboard.OwnClipboard); } return clipboardOwn; } } public static PermissionSet ClipboardWrite { // Can't assert OwnClipboard & UnmanagedCode in the same context, need permission set. get { if (clipboardWrite == null) { clipboardWrite = new PermissionSet(PermissionState.None); clipboardWrite.SetPermission(IntSecurity.UnmanagedCode); clipboardWrite.SetPermission(IntSecurity.ClipboardOwn); } return clipboardWrite; } } public static CodeAccessPermission ChangeWindowRegionForTopLevel { get { if (changeWindowRegionForTopLevel == null) { changeWindowRegionForTopLevel = AllWindows; } return changeWindowRegionForTopLevel; } } public static CodeAccessPermission ControlFromHandleOrLocation { get { if (controlFromHandleOrLocation == null) { controlFromHandleOrLocation = AllWindows; } return controlFromHandleOrLocation; } } public static CodeAccessPermission CreateAnyWindow { get { if (createAnyWindow == null) { createAnyWindow = SafeSubWindows; } return createAnyWindow; } } public static CodeAccessPermission CreateGraphicsForControl { get { if (createGraphicsForControl == null) { createGraphicsForControl = SafeSubWindows; } return createGraphicsForControl; } } public static CodeAccessPermission DefaultPrinting { get { if (defaultPrinting == null) { defaultPrinting = new PrintingPermission(PrintingPermissionLevel.DefaultPrinting); } return defaultPrinting; } } public static CodeAccessPermission FileDialogCustomization { get { if (fileDialogCustomization == null) { fileDialogCustomization = new FileIOPermission(PermissionState.Unrestricted); } return fileDialogCustomization; } } public static CodeAccessPermission FileDialogOpenFile { get { if (fileDialogOpenFile == null) { fileDialogOpenFile = new FileDialogPermission(FileDialogPermissionAccess.Open); } return fileDialogOpenFile; } } public static CodeAccessPermission FileDialogSaveFile { get { if (fileDialogSaveFile == null) { fileDialogSaveFile = new FileDialogPermission(FileDialogPermissionAccess.Save); } return fileDialogSaveFile; } } /* Unused public static CodeAccessPermission RestrictedWebBrowserPermission { get { if (restrictedWebBrowserPermission == null) { restrictedWebBrowserPermission = new WebBrowserPermission(WebBrowserPermissionLevel.Restricted); } return restrictedWebBrowserPermission; } } public static CodeAccessPermission DefaultWebBrowserPermission { get { if (defaultWebBrowserPermission == null) { defaultWebBrowserPermission = new WebBrowserPermission(WebBrowserPermissionLevel.Default); } return defaultWebBrowserPermission; } } */ public static CodeAccessPermission GetCapture { get { if (getCapture == null) { getCapture = AllWindows; } return getCapture; } } public static CodeAccessPermission GetParent { get { if (getParent == null) { getParent = AllWindows; } return getParent; } } public static CodeAccessPermission ManipulateWndProcAndHandles { get { if (manipulateWndProcAndHandles == null) { manipulateWndProcAndHandles = AllWindows; } return manipulateWndProcAndHandles; } } /* Unused public static CodeAccessPermission MinimizeWindowProgrammatically { get { if (minimizeWindowProgrammatically == null) { minimizeWindowProgrammatically = AllWindows; } return minimizeWindowProgrammatically; } } */ public static CodeAccessPermission ModifyCursor { get { if (modifyCursor == null) { modifyCursor = SafeSubWindows; } return modifyCursor; } } public static CodeAccessPermission ModifyFocus { get { if (modifyFocus == null) { modifyFocus = AllWindows; } return modifyFocus; } } /* Unused public static CodeAccessPermission NoPrinting { get { if (noPrinting == null) { noPrinting = new PrintingPermission(PrintingPermissionLevel.NoPrinting); } return noPrinting; } } */ public static CodeAccessPermission ObjectFromWin32Handle { get { if (objectFromWin32Handle == null) { objectFromWin32Handle = UnmanagedCode; } return objectFromWin32Handle; } } public static CodeAccessPermission SafePrinting { get { if (safePrinting == null) { safePrinting = new PrintingPermission(PrintingPermissionLevel.SafePrinting); } return safePrinting; } } public static CodeAccessPermission SafeSubWindows { get { if (safeSubWindows == null) { safeSubWindows = new UIPermission(UIPermissionWindow.SafeSubWindows); } return safeSubWindows; } } public static CodeAccessPermission SafeTopLevelWindows { get { if (safeTopLevelWindows == null) { safeTopLevelWindows = new UIPermission(UIPermissionWindow.SafeTopLevelWindows); } return safeTopLevelWindows; } } public static CodeAccessPermission SendMessages { get { if (sendMessages == null) { sendMessages = UnmanagedCode; } return sendMessages; } } public static CodeAccessPermission SensitiveSystemInformation { get { if (sensitiveSystemInformation == null) { sensitiveSystemInformation = new EnvironmentPermission(PermissionState.Unrestricted); } return sensitiveSystemInformation; } } /* Unused public static CodeAccessPermission ScreenDC { get { if (screenDC == null) { screenDC = AllWindows; } return screenDC; } } */ public static CodeAccessPermission TransparentWindows { get { if (transparentWindows == null) { transparentWindows = AllWindows; } return transparentWindows; } } public static CodeAccessPermission TopLevelWindow { get { if (topLevelWindow == null) { topLevelWindow = SafeTopLevelWindows; } return topLevelWindow; } } /* Unused public static CodeAccessPermission TopMostWindow { get { if (topMostWindow == null) { topMostWindow = AllWindows; } return topMostWindow; } } */ public static CodeAccessPermission UnmanagedCode { get { if (unmanagedCode == null) { unmanagedCode = new SecurityPermission(SecurityPermissionFlag.UnmanagedCode); } return unmanagedCode; } } /* public static CodeAccessPermission UnrestrictedEnvironment { get { if (unrestrictedEnvironment == null) { unrestrictedEnvironment = new EnvironmentPermission(PermissionState.Unrestricted); } return unrestrictedEnvironment; } } */ public static CodeAccessPermission UnrestrictedWindows { get { if (unrestrictedWindows == null) { unrestrictedWindows = AllWindows; } return unrestrictedWindows; } } /* FXCop avoid unused code public static CodeAccessPermission Win32HandleManipulation { get { if (win32HandleManipulation == null) { win32HandleManipulation = UnmanagedCode; } return win32HandleManipulation; } } */ public static CodeAccessPermission WindowAdornmentModification { get { if (windowAdornmentModification == null) { windowAdornmentModification = AllWindows; } return windowAdornmentModification; } } /* unused public static CodeAccessPermission AutoComplete { get { if (autoComplete == null) { autoComplete = UnmanagedCode; } return autoComplete; } } */ [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] internal static string UnsafeGetFullPath(string fileName) { string full = fileName; FileIOPermission fiop = new FileIOPermission( PermissionState.None ); fiop.AllFiles = FileIOPermissionAccess.PathDiscovery; fiop.Assert(); try { full = Path.GetFullPath(fileName); } finally { CodeAccessPermission.RevertAssert(); } return full; } /// SECREVIEW: ReviewImperativeSecurity /// vulnerability to watch out for: A method uses imperative security and might be constructing the permission using state information or return values that can change while the demand is active. /// reason for exclude: fileName is a local variable and not subject to race conditions. [SuppressMessage("Microsoft.Security", "CA2103:ReviewImperativeSecurity")] internal static void DemandFileIO(FileIOPermissionAccess access, string fileName) { new FileIOPermission(access, UnsafeGetFullPath(fileName)).Demand(); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Diagnostics; using System.Diagnostics.CodeAnalysis; using System; using System.IO; using System.Security.Permissions; using System.Security; using System.Drawing.Printing; using System.Runtime.Versioning; internal static class IntSecurity { public static readonly TraceSwitch SecurityDemand = new TraceSwitch("SecurityDemand", "Trace when security demands occur."); #if DEBUG public static readonly BooleanSwitch MapSafeTopLevelToSafeSub = new BooleanSwitch("MapSafeTopLevelToSafeSub", "Maps the SafeTopLevelWindow UI permission to SafeSubWindow permission. Must restart to take effect."); #endif private static CodeAccessPermission adjustCursorClip; private static CodeAccessPermission affectMachineState; private static CodeAccessPermission affectThreadBehavior; private static CodeAccessPermission allPrinting; private static PermissionSet allPrintingAndUnmanagedCode; // Can't assert twice in the same method private static CodeAccessPermission allWindows; private static CodeAccessPermission clipboardRead; private static CodeAccessPermission clipboardOwn; private static PermissionSet clipboardWrite; // Can't assert twice in the same method private static CodeAccessPermission changeWindowRegionForTopLevel; private static CodeAccessPermission controlFromHandleOrLocation; private static CodeAccessPermission createAnyWindow; private static CodeAccessPermission createGraphicsForControl; private static CodeAccessPermission defaultPrinting; private static CodeAccessPermission fileDialogCustomization; private static CodeAccessPermission fileDialogOpenFile; private static CodeAccessPermission fileDialogSaveFile; private static CodeAccessPermission getCapture; private static CodeAccessPermission getParent; private static CodeAccessPermission manipulateWndProcAndHandles; private static CodeAccessPermission modifyCursor; private static CodeAccessPermission modifyFocus; private static CodeAccessPermission objectFromWin32Handle; private static CodeAccessPermission safePrinting; private static CodeAccessPermission safeSubWindows; private static CodeAccessPermission safeTopLevelWindows; private static CodeAccessPermission sendMessages; private static CodeAccessPermission sensitiveSystemInformation; private static CodeAccessPermission transparentWindows; private static CodeAccessPermission topLevelWindow; private static CodeAccessPermission unmanagedCode; private static CodeAccessPermission unrestrictedWindows; private static CodeAccessPermission windowAdornmentModification; /* Unused permissions private static CodeAccessPermission win32HandleManipulation; private static CodeAccessPermission minimizeWindowProgrammatically; private static CodeAccessPermission restrictedWebBrowserPermission; private static CodeAccessPermission noPrinting; private static CodeAccessPermission topMostWindow; private static CodeAccessPermission unrestrictedEnvironment; private static CodeAccessPermission autoComplete; private static CodeAccessPermission defaultWebBrowserPermission; private static CodeAccessPermission screenDC; */ // // Property accessors for permissions. Don't allocate permissions up front -- always // demand create them. A great many codepaths never need all these permissions so it is wasteful to // create them. // public static CodeAccessPermission AdjustCursorClip { get { if (adjustCursorClip == null) { adjustCursorClip = AllWindows; } return adjustCursorClip; } } public static CodeAccessPermission AdjustCursorPosition { get { return AllWindows; } } public static CodeAccessPermission AffectMachineState { get { if (affectMachineState == null) { affectMachineState = UnmanagedCode; } return affectMachineState; } } public static CodeAccessPermission AffectThreadBehavior { get { if (affectThreadBehavior == null) { affectThreadBehavior = UnmanagedCode; } return affectThreadBehavior; } } public static CodeAccessPermission AllPrinting { get { if (allPrinting == null) { allPrinting = new PrintingPermission(PrintingPermissionLevel.AllPrinting); } return allPrinting; } } public static PermissionSet AllPrintingAndUnmanagedCode { // Can't assert twice in the same method. See ASURT 52788. get { if (allPrintingAndUnmanagedCode == null) { PermissionSet temp = new PermissionSet(PermissionState.None); temp.SetPermission(IntSecurity.UnmanagedCode); temp.SetPermission(IntSecurity.AllPrinting); allPrintingAndUnmanagedCode = temp; } return allPrintingAndUnmanagedCode; } } public static CodeAccessPermission AllWindows { get { if (allWindows == null) { allWindows = new UIPermission(UIPermissionWindow.AllWindows); } return allWindows; } } public static CodeAccessPermission ClipboardRead { get { if (clipboardRead == null) { clipboardRead = new UIPermission(UIPermissionClipboard.AllClipboard); } return clipboardRead; } } public static CodeAccessPermission ClipboardOwn { get { if (clipboardOwn == null) { clipboardOwn = new UIPermission(UIPermissionClipboard.OwnClipboard); } return clipboardOwn; } } public static PermissionSet ClipboardWrite { // Can't assert OwnClipboard & UnmanagedCode in the same context, need permission set. get { if (clipboardWrite == null) { clipboardWrite = new PermissionSet(PermissionState.None); clipboardWrite.SetPermission(IntSecurity.UnmanagedCode); clipboardWrite.SetPermission(IntSecurity.ClipboardOwn); } return clipboardWrite; } } public static CodeAccessPermission ChangeWindowRegionForTopLevel { get { if (changeWindowRegionForTopLevel == null) { changeWindowRegionForTopLevel = AllWindows; } return changeWindowRegionForTopLevel; } } public static CodeAccessPermission ControlFromHandleOrLocation { get { if (controlFromHandleOrLocation == null) { controlFromHandleOrLocation = AllWindows; } return controlFromHandleOrLocation; } } public static CodeAccessPermission CreateAnyWindow { get { if (createAnyWindow == null) { createAnyWindow = SafeSubWindows; } return createAnyWindow; } } public static CodeAccessPermission CreateGraphicsForControl { get { if (createGraphicsForControl == null) { createGraphicsForControl = SafeSubWindows; } return createGraphicsForControl; } } public static CodeAccessPermission DefaultPrinting { get { if (defaultPrinting == null) { defaultPrinting = new PrintingPermission(PrintingPermissionLevel.DefaultPrinting); } return defaultPrinting; } } public static CodeAccessPermission FileDialogCustomization { get { if (fileDialogCustomization == null) { fileDialogCustomization = new FileIOPermission(PermissionState.Unrestricted); } return fileDialogCustomization; } } public static CodeAccessPermission FileDialogOpenFile { get { if (fileDialogOpenFile == null) { fileDialogOpenFile = new FileDialogPermission(FileDialogPermissionAccess.Open); } return fileDialogOpenFile; } } public static CodeAccessPermission FileDialogSaveFile { get { if (fileDialogSaveFile == null) { fileDialogSaveFile = new FileDialogPermission(FileDialogPermissionAccess.Save); } return fileDialogSaveFile; } } /* Unused public static CodeAccessPermission RestrictedWebBrowserPermission { get { if (restrictedWebBrowserPermission == null) { restrictedWebBrowserPermission = new WebBrowserPermission(WebBrowserPermissionLevel.Restricted); } return restrictedWebBrowserPermission; } } public static CodeAccessPermission DefaultWebBrowserPermission { get { if (defaultWebBrowserPermission == null) { defaultWebBrowserPermission = new WebBrowserPermission(WebBrowserPermissionLevel.Default); } return defaultWebBrowserPermission; } } */ public static CodeAccessPermission GetCapture { get { if (getCapture == null) { getCapture = AllWindows; } return getCapture; } } public static CodeAccessPermission GetParent { get { if (getParent == null) { getParent = AllWindows; } return getParent; } } public static CodeAccessPermission ManipulateWndProcAndHandles { get { if (manipulateWndProcAndHandles == null) { manipulateWndProcAndHandles = AllWindows; } return manipulateWndProcAndHandles; } } /* Unused public static CodeAccessPermission MinimizeWindowProgrammatically { get { if (minimizeWindowProgrammatically == null) { minimizeWindowProgrammatically = AllWindows; } return minimizeWindowProgrammatically; } } */ public static CodeAccessPermission ModifyCursor { get { if (modifyCursor == null) { modifyCursor = SafeSubWindows; } return modifyCursor; } } public static CodeAccessPermission ModifyFocus { get { if (modifyFocus == null) { modifyFocus = AllWindows; } return modifyFocus; } } /* Unused public static CodeAccessPermission NoPrinting { get { if (noPrinting == null) { noPrinting = new PrintingPermission(PrintingPermissionLevel.NoPrinting); } return noPrinting; } } */ public static CodeAccessPermission ObjectFromWin32Handle { get { if (objectFromWin32Handle == null) { objectFromWin32Handle = UnmanagedCode; } return objectFromWin32Handle; } } public static CodeAccessPermission SafePrinting { get { if (safePrinting == null) { safePrinting = new PrintingPermission(PrintingPermissionLevel.SafePrinting); } return safePrinting; } } public static CodeAccessPermission SafeSubWindows { get { if (safeSubWindows == null) { safeSubWindows = new UIPermission(UIPermissionWindow.SafeSubWindows); } return safeSubWindows; } } public static CodeAccessPermission SafeTopLevelWindows { get { if (safeTopLevelWindows == null) { safeTopLevelWindows = new UIPermission(UIPermissionWindow.SafeTopLevelWindows); } return safeTopLevelWindows; } } public static CodeAccessPermission SendMessages { get { if (sendMessages == null) { sendMessages = UnmanagedCode; } return sendMessages; } } public static CodeAccessPermission SensitiveSystemInformation { get { if (sensitiveSystemInformation == null) { sensitiveSystemInformation = new EnvironmentPermission(PermissionState.Unrestricted); } return sensitiveSystemInformation; } } /* Unused public static CodeAccessPermission ScreenDC { get { if (screenDC == null) { screenDC = AllWindows; } return screenDC; } } */ public static CodeAccessPermission TransparentWindows { get { if (transparentWindows == null) { transparentWindows = AllWindows; } return transparentWindows; } } public static CodeAccessPermission TopLevelWindow { get { if (topLevelWindow == null) { topLevelWindow = SafeTopLevelWindows; } return topLevelWindow; } } /* Unused public static CodeAccessPermission TopMostWindow { get { if (topMostWindow == null) { topMostWindow = AllWindows; } return topMostWindow; } } */ public static CodeAccessPermission UnmanagedCode { get { if (unmanagedCode == null) { unmanagedCode = new SecurityPermission(SecurityPermissionFlag.UnmanagedCode); } return unmanagedCode; } } /* public static CodeAccessPermission UnrestrictedEnvironment { get { if (unrestrictedEnvironment == null) { unrestrictedEnvironment = new EnvironmentPermission(PermissionState.Unrestricted); } return unrestrictedEnvironment; } } */ public static CodeAccessPermission UnrestrictedWindows { get { if (unrestrictedWindows == null) { unrestrictedWindows = AllWindows; } return unrestrictedWindows; } } /* FXCop avoid unused code public static CodeAccessPermission Win32HandleManipulation { get { if (win32HandleManipulation == null) { win32HandleManipulation = UnmanagedCode; } return win32HandleManipulation; } } */ public static CodeAccessPermission WindowAdornmentModification { get { if (windowAdornmentModification == null) { windowAdornmentModification = AllWindows; } return windowAdornmentModification; } } /* unused public static CodeAccessPermission AutoComplete { get { if (autoComplete == null) { autoComplete = UnmanagedCode; } return autoComplete; } } */ [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] internal static string UnsafeGetFullPath(string fileName) { string full = fileName; FileIOPermission fiop = new FileIOPermission( PermissionState.None ); fiop.AllFiles = FileIOPermissionAccess.PathDiscovery; fiop.Assert(); try { full = Path.GetFullPath(fileName); } finally { CodeAccessPermission.RevertAssert(); } return full; } /// SECREVIEW: ReviewImperativeSecurity /// vulnerability to watch out for: A method uses imperative security and might be constructing the permission using state information or return values that can change while the demand is active. /// reason for exclude: fileName is a local variable and not subject to race conditions. [SuppressMessage("Microsoft.Security", "CA2103:ReviewImperativeSecurity")] internal static void DemandFileIO(FileIOPermissionAccess access, string fileName) { new FileIOPermission(access, UnsafeGetFullPath(fileName)).Demand(); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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