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Control.EndInvoke Method

Retrieves the return value of the asynchronous operation represented by the IAsyncResult passed.

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

public Object EndInvoke (
	IAsyncResult asyncResult
)
public final Object EndInvoke (
	IAsyncResult asyncResult
)
public final function EndInvoke (
	asyncResult : IAsyncResult
) : Object
Not applicable.

Parameters

asyncResult

The IAsyncResult that represents a specific invoke asynchronous operation, returned when calling BeginInvoke.

Return Value

The Object generated by the asynchronous operation.

Exception typeCondition

ArgumentNullException

The asyncResult parameter value is a null reference (Nothing in Visual Basic).

ArgumentException

The asyncResult object was not created by a preceding call of the BeginInvoke method from the same control.

If the asynchronous operation has not been completed, this function will block until the result is available.

NoteNote:

In addition to the InvokeRequired property, there are four methods on a control that are thread safe: Invoke, BeginInvoke, EndInvoke, and CreateGraphics if the handle for the control has already been created. Calling CreateGraphics before the control's handle has been created on a background thread can cause illegal cross thread calls. For all other method calls, you should use one of the invoke methods to marshal the call to the control's thread.

Windows 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

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