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InvokePattern.Invoke Method

Sends a request to activate a control and initiate its single, unambiguous action.

Namespace:  System.Windows.Automation
Assembly:  UIAutomationClient (in UIAutomationClient.dll)

public void Invoke()


The element does not support the InvokePattern control pattern or is hidden or blocked.


The element is not enabled. Can be raised when a UI Automation provider has implemented its own handling of the IsEnabled property.

Calls to Invoke should return immediately without blocking. However, this behavior is entirely dependent on the Microsoft UI Automation provider implementation. In scenarios where calling Invoke causes a blocking issue (such as a modal dialog) a separate helper thread may be required to call the method.

In the following example an InvokePattern control pattern is obtained from a control and the Invoke method is called.

/// <summary> 
/// Obtains an InvokePattern control pattern from a control 
/// and calls the InvokePattern.Invoke() method on the control. 
/// </summary> 
/// <param name="targetControl">
/// The control of interest. 
/// </param> 
private void InvokeControl(AutomationElement targetControl)
    InvokePattern invokePattern = null;

        invokePattern =
            as InvokePattern;
    catch (ElementNotEnabledException)
        // Object is not enabled 
    catch (InvalidOperationException)
        // object doesn't support the InvokePattern control pattern 


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.

.NET Framework

Supported in: 3.5, 3.0