wpfでの動作

 <Grid>
        <StackPanel>
             <TextBox Width="100" Height="30" Margin="40">
                <i:Interaction.Behaviors>
                    <local:EffectBehavior/>
                </i:Interaction.Behaviors>
            </TextBox>
        </StackPanel>
    </Grid>

 

 public class EffectBehavior: Behavior<FrameworkElement>
    {
        protected override void OnAttached()
        {
            base.OnAttached();
            AssociatedObject.MouseMove += AssociatedObject_MouseMouve;
            AssociatedObject.MouseLeave += AssociatedObject_MouseLeave;
        }
        /// <summary>
        /// 鼠标移入，控件边框变为透明
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>