实现了当移近按钮的时候，按钮显现外发光的特效，用WPF实现比较容易。

 

<Window.Resources>  

        <Style TargetType="{x:Type Button}">  

            <Style.Triggers>  

                <Trigger Property="IsMouseOver" Value="True">  

                    <!--Setter Property="Background" Value="Orange"></Setter-->  

                    <Setter Property="BitmapEffect">  

                        <Setter.Value>  

                            <OuterGlowBitmapEffect GlowSize="20" Noise=".3" GlowColor="Red"></OuterGlowBitmapEffect>  

                        </Setter.Value>  

                    </Setter>  

                </Trigger>  

            </Style.Triggers>  

        </Style>  

    </Window.Resources>  

       

    <Grid x:Name="LayoutRoot">  

        <Button x:Name="button" Margin="200,160,240,182" Content="Button" MouseEnter="button_MouseEnter">    

        </Button>  

    </Grid>