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.NET Framework 2.0
Control Class
Control Properties
 CheckForIllegalCrossThreadCalls Pro...
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This page is specific to
Microsoft Visual Studio 2005/.NET Framework 2.0

Other versions are also available for the following:
.NET Framework Class Library
Control.CheckForIllegalCrossThreadCalls Property

Note: This property is new in the .NET Framework version 2.0.

Gets or sets a value indicating whether to catch calls on the wrong thread that access a control's Handle property.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

Visual Basic (Declaration)
Public Shared Property CheckForIllegalCrossThreadCalls As Boolean
Visual Basic (Usage)
Dim value As Boolean

value = Control.CheckForIllegalCrossThreadCalls

Control.CheckForIllegalCrossThreadCalls = value
C#
public static bool CheckForIllegalCrossThreadCalls { get; set; }
C++
public:
static property bool CheckForIllegalCrossThreadCalls {
    bool get ();
    void set (bool value);
}
J#
/** @property */
public static boolean get_CheckForIllegalCrossThreadCalls ()

/** @property */
public static void set_CheckForIllegalCrossThreadCalls (boolean value)
JScript
public static function get CheckForIllegalCrossThreadCalls () : boolean

public static function set CheckForIllegalCrossThreadCalls (value : boolean)

Property Value

true if calls on the wrong thread are caught; otherwise, false.

When a thread other than the creating thread of a control tries to access one of that control's methods or properties, it often leads to unpredictable results. A common invalid thread activity is a call on the wrong thread that accesses the control's Handle property. Set CheckForIllegalCrossThreadCalls to true to find and diagnose this thread activity more easily.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, 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
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