How to translate the image movement into points of stroke

Hi everyone, I have an image with a menu. I want to draw some lines by choosing an option in the menu. These lines should be drawn on SurfaceInkCanvas by using an object such as an icon or a small image. I want when the user moves a small icon, a line is drawn on the screen. The problem here is I don't know how to translate the image movement into points of stroke because the handler called from the menu doesn't have MouseEventArgs, which means I can't get the position of the image. Here is the code for the handler:

private void ElementMenuItem_ClickDraw(object sender, RoutedEventArgs e)
        {  
            userInput.Visibility = Visibility.Collapsed;
            cancelButton.Visibility = Visibility.Collapsed;
            okButton.Visibility = Visibility.Collapsed;          

            InkCanvasControl.EditingMode = SurfaceInkEditingMode.Ink;
            InkCanvasControl.IsHitTestVisible = true;
            InkCanvasControl.DefaultDrawingAttributes.Color = Colors.Red;          
        }

With this code, I can draw by using finger, but not using the image. Could you help me to solve this? Thanks.

Regards,

Faro