PropertyChanged Event

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Controls; 
 
public void PropertyChangedExample() 
{ 
   // Hook to the property changed event of the viewer 
   _viewer.PropertyChanged += _viewer_PropertyChanged; 
   _viewer.ScrollOffset = new Point(100, 100); 
} 
void _viewer_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e) 
{ 
   // Check the property name, we are interested in "ScaleFactor" and "ScrollOffset" 
   string  propertyName = e.PropertyName; 
   if (propertyName == "ScaleFactor" ||   propertyName == "ScrollOffset") 
   { 
      _infoLabel.Text = propertyName + "Changed"; 
   } 
}