从代码隐藏设置silverlight控件的视觉元素

我正在silverlight中工作，可以处于各种状态。每个州都有自己的外观，不同的颜色，甚至按钮上的图像也不同。

我想知道我如何修改从代码隐藏控件的视觉属性?

这里是xaml:

<Style x:Key="MyButton" TargetType="Button">
            <Setter Property="FontSize" Value="10"/>
            <Setter Property="Height" Value="22"/>
            <Setter Property="Foreground" Value="White"/>
            <Setter Property="VerticalAlignment" Value="Center"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Grid Name="RootElement">
                            <vsm:VisualStateManager.VisualStateGroups>
                                <vsm:VisualStateGroup x:Name="CommonStates">
                                    <vsm:VisualState x:Name="Normal"/>
                                    <vsm:VisualState x:Name="MouseOver">
                                    </vsm:VisualState>
                                    <vsm:VisualState x:Name="Pressed">
                                        <Storyboard>
                                            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:01.0010000" Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.RenderTransform). (TransformGroup.Children)[0].(ScaleTransform.ScaleX)">
                                                <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0.94"/>
                                            </DoubleAnimationUsingKeyFrames>
                                            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:01.0010000" Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.RenderTransform). (TransformGroup.Children)[0].(ScaleTransform.ScaleY)">
                                                <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0.94"/>
                                            </DoubleAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </vsm:VisualState>
                                    <vsm:VisualState x:Name="Disabled">
                                        <Storyboard/>
                                    </vsm:VisualState>
                                </vsm:VisualStateGroup>
                                <vsm:VisualStateGroup x:Name="FocusStates">
                                    <vsm:VisualState x:Name="Focused">
                                        <Storyboard/>
                                    </vsm:VisualState>
                                    <vsm:VisualState x:Name="Unfocused"/>
                                </vsm:VisualStateGroup>
                            </vsm:VisualStateManager.VisualStateGroups>
                            <Border CornerRadius="1,1,1,1" Background="{StaticResource BlueVerticalGradientBrush}" BorderBrush="Red" BorderThickness="1,1,1,1" x:Name="MouseOver" RenderTransformOrigin="0.5,0.5">
                                <Border.RenderTransform>
                                    <TransformGroup>
                                        <ScaleTransform/>
                                        <SkewTransform/>
                                        <RotateTransform/>
                                        <TranslateTransform/>
                                    </TransformGroup>
                                </Border.RenderTransform>
                                <ContentPresenter x:Name="contentPresenter" Margin="10,0,10,0" ContentTemplate="{TemplateBinding ContentTemplate}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
                            </Border>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
            <Setter Property="MinWidth" Value="65"/>
        </Style>