Detecting Pen

The PointerEventArgs.DeviceType property indicates the type of device used in the event handler. The property returns Touch for finger and Pen for Pen device.

Ensure your device supports the Pen device.
Create a new Windows Forms Application Project.
Add a Standard Button control and a C1TouchEventProvider control to the Form.
Use the following code:

[C#]

using C1.Win.TouchToolKit;

private void Form1_Load(object sender, EventArgs e)
{
  c1TouchEventProvider1.SetEnableTouchEvents(button1, true);
  c1TouchEventProvider1.Tapped += c1TouchEventProvider1_Tapped;
  button1.Click += button1_Click;
}

private void c1TouchEventProvider1_Tapped(object sender, TappedEventArgs e)
{
  if (e.TargetControl == this.button1)
  {
    if (e.PointerDeviceType == PointerDeviceType.Touch)
    {
      MessageBox.Show("Pressed by Touch");
    }
    else if (e.PointerDeviceType == PointerDeviceType.Pen)
    {
      MessageBox.Show("Pressed by Pen");
    }
  }
}

private void button1_Click(object sender, EventArgs e)
{
  MessageBox.Show("Pressed by Mouse");
}

[Visual Basic]

Imports C1.Win.TouchToolKit

Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
  C1TouchEventProvider1.SetEnableTouchEvents(Button1, True)
End Sub

Private Sub C1TouchEventProvider1_Tapped(sender As System.Object, e As TappedEventArgs) Handles C1TouchEventProvider1.Tapped
  If e.TargetControl Is Button1 Then
    If e.PointerDeviceType = PointerDeviceType.Touch Then
      MessageBox.Show("Pressed by Touch")
    ElseIf e.PointerDeviceType = PointerDeviceType.Pen Then
      MessageBox.Show("Pressed by Pen")
    End If
  End If
End Sub

Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
  MessageBox.Show("Pressed by Mouse")
End Sub