Occurs when the cursor tip contacts the digitizing tablet surface.
Assembly: Microsoft.Ink (in Microsoft.Ink.dll)
The event handler receives an argument of type InkCollectorCursorDownEventArgs containing data about this event.
When you create an InkCollectorCursorDownEventHandler 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. For performance reasons, the default event interest is off but is turned on automatically if you add an event handler.
This event may have an adverse effect on ink performance if too much code is executed in the event handlers. To improve real-time ink performance, hide the mouse cursor while inking. To do so, hide the mouse cursor in the MouseDown event handler, and show the mouse cursor in the MouseUp event handler.
This example demonstrates how you can subscribe to the event, and the Stroke event to calculate the length of time it takes the user to create a stroke.
Private Sub mInkObject_CursorDown(ByVal sender As Object, ByVal e As InkCollectorCursorDownEventArgs) ' add extended property indicating the time the stroke started ' STROKE_START_GUID is class level string via GUID generator e.Stroke.ExtendedProperties.Add(New Guid(STROKE_START_GUID), DateTime.Now) End Sub
Private Sub mInkObject_Stroke1(ByVal sender As Object, ByVal e As InkCollectorStrokeEventArgs) ' check to see if extended property for start time exists ' Attempting to access an extended property that hasn't been created throws an exception ' STROKE_START_GUID is class level string via GUID generator If (e.Stroke.ExtendedProperties.DoesPropertyExist(New Guid(STROKE_START_GUID))) Then Dim startTime As DateTime = DirectCast(e.Stroke.ExtendedProperties(New Guid(STROKE_START_GUID)).Data, DateTime) Dim endTime As DateTime = DateTime.Now Dim span As TimeSpan = New TimeSpan(endTime.Ticks - startTime.Ticks) ' add extended property indicating the time the stroke ended ' STROKE_END_GUID is class level string via GUID generator e.Stroke.ExtendedProperties.Add(New Guid(STROKE_END_GUID), endTime) ' display the number of seconds in creating this stroke Me.statusLabelStrokeTime.Text = span.TotalSeconds.ToString() End If End Sub
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.