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InkOverlay.SystemGesture Event

Occurs when a system gesture is recognized.

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

public event InkCollectorSystemGestureEventHandler SystemGesture

System gestures give information about the Cursor object that is being used to create the gesture. They also provide shortcuts to combinations of mouse events and are effective ways to detect mouse events.

For example, instead of listening for a pair of MouseUp and MouseDown events with no other mouse events occurring in between, listen for the Tap or RightTap system gestures.

As another example, instead of listening for MouseDown and MouseMove events and getting numerous MouseMove messages, listen for the Drag or RightDrag system gestures as long as you have no need for the (x, y) coordinates of every position of the mouse. This allows you to receive only one message instead of numerous MouseMove messages.

For a list of specific system gestures, see the SystemGesture enumeration type. For more information about system gestures, see Command Input on the Tablet PC and Using Gestures.

The event handler receives an argument of type InkCollectorSystemGestureEventArgs containing data about this event.

When you create an InkCollectorSystemGestureEventHandler 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.

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

private void Event_OnSystemGesture(object sender, InkCollectorSystemGestureEventArgs e)
    switch (e.Id)
        case SystemGesture.Tap:
            this.statusLabelSysGesture.Text = "Tap";
        case SystemGesture.DoubleTap:
            this.statusLabelSysGesture.Text = "Double Tap";


Prior to collection of system gestures, the InkOverlay object, mInkOverlay registers the event handler.

// register the SystemGesture event handler
mInkOverlay.SystemGesture += new InkCollectorSystemGestureEventHandler(Event_OnSystemGesture);

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