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InkCollectorGestureEventHandler Delegate

Represents the method that handles the Gesture event of an InkCollector object.

Namespace:  Microsoft.Ink
Assembly:  Microsoft.Ink (in Microsoft.Ink.dll)

public delegate void InkCollectorGestureEventHandler(
	Object sender,
	InkCollectorGestureEventArgs e


Type: System.Object

The source InkCollector object of this event.

Type: Microsoft.Ink.InkCollectorGestureEventArgs

The InkCollectorGestureEventArgs object that contains the event data.

The Gesture event occurs when the user performs a predefined application gesture with the pen, which is recognized by an application gesture recognizer.

When you create an InkCollectorGestureEventHandler delegate, you identify the method that handles the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate.

When the CollectionMode property is set to GestureOnly, the timeout between when a user adds a gesture and when the Gesture event occurs is a fixed value that you cannot alter programmatically. Gesture recognition is faster in InkAndGesture mode.

To prevent the collection of ink while in InkAndGesture mode:

To prevent the flow of ink while gesturing, set the DynamicRendering property to false.


To recognize gestures, you must use an object or control that can collect ink.


The InkCollector object, the InkOverlay object, and the InkPicture control use the InkCollectorGestureEventHandler delegate to add a Gesture event handler.

The event handler in this example displays application gesture information on a status bar label, statusLabelAppGesture.

void Event_OnApplicationGesture(object sender, InkCollectorGestureEventArgs e)
    // There might be more than one gesture passed in InkCollectorGestureEventArgs 
    // The gestures are arranged in order of confidence from most to least 
    // This event handler is only concerned with the first (most confident) gesture
    Gesture G = e.Gestures[0];

    // we will use the gesture if it has confidence of strong or intermediate 

    if (G.Confidence == RecognitionConfidence.Intermediate ||
        G.Confidence == RecognitionConfidence.Strong)

        switch (G.Id)
            case ApplicationGesture.Left:
                statusLabelAppGesture.Text = "Left";
            case ApplicationGesture.Right:
                statusLabelAppGesture.Text = "Right";
            case ApplicationGesture.Up:
                statusLabelAppGesture.Text = "Up";
            case ApplicationGesture.Down:
                statusLabelAppGesture.Text = "Down";


Only application gestures in which you have expressed an interest will fire this event. In this example, the InkCollector object, mInkCollector expresses an interest in four gestures of the ApplicationGesture enumeration.

// set InkCollector interest in the Left, Right, Up, Down gestures
mInkCollector.SetGestureStatus(ApplicationGesture.Left, true);
mInkCollector.SetGestureStatus(ApplicationGesture.Right, true);
mInkCollector.SetGestureStatus(ApplicationGesture.Up, true);
mInkCollector.SetGestureStatus(ApplicationGesture.Down, true);

Windows 7, Windows Vista, Windows Server 2008 R2, Windows Server 2008

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: 3.0