DispatcherOperationCallback Delegate (System.Windows.Threading)

DispatcherOperationCallback Delegat...

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This page is specific to

Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:

.NET Framework Class Library

DispatcherOperationCallback Delegate

Represents a delegate to use for dispatcher operations.

Namespace: System.Windows.Threading
Assembly: WindowsBase (in WindowsBase.dll)

Syntax

Visual Basic (Declaration)

Public Delegate Function DispatcherOperationCallback ( _
    arg As Object _
) As Object

Visual Basic (Usage)

Dim instance As New DispatcherOperationCallback(AddressOf HandlerMethod)

public delegate Object DispatcherOperationCallback(
    Object arg
)

Visual C++

public delegate Object^ DispatcherOperationCallback(
    Object^ arg
)

JScript

JScript does not support delegates.

XAML

In XAML, you can use delegates but you cannot define your own.

Parameters

arg: Type: System..::.Object
An argument passed to the callback.

Return Value

Type: System..::.Object
The object returned by the callback.

Remarks

It is not necessary to use this delegate for dispatcher operations, but DispatcherOperationCallback and SendOrPostCallback use dynamic invoking.

Partial Trust applications do not support dynamic invoking, so you must use either DispatcherOperationCallback or SendOrPostCallback if the application is going to be running in Partial Trust.

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

Version Information

.NET Framework

Supported in: 3.5, 3.0

Reference

System.Windows.Threading Namespace

Invoke

BeginInvoke