public class ComboBoxPreviewMouseDownBehavior : System.Windows.Interactivity.Behavior<FrameworkElement>, System.Windows.Interactivity.IAttachedObject, System.Windows.Media.Animation.IAnimatable
Public Class ComboBoxPreviewMouseDownBehavior Inherits System.Windows.Interactivity.Behavior(Of FrameworkElement) Implements System.Windows.Interactivity.IAttachedObject, System.Windows.Media.Animation.IAnimatable