<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Animation">
<Window.Resources>
<Style TargetType="{x:Type Button}">
<Setter Property="VerticalAlignment" Value="Bottom"/>
<Setter Property="LayoutTransform">
<Setter.Value>
<ScaleTransform/>
</Setter.Value>
</Setter>
<Style.Triggers>
<EventTrigger RoutedEvent="Button.MouseEnter">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.ScaleX"
To="2" Duration="0:0:0.25"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
<EventTrigger RoutedEvent="Button.MouseLeave">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.ScaleX"
To="1" Duration="0:0:0.25"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Style.Triggers>
</Style>
</Window.Resources>
<StackPanel Orientation="Horizontal">
<Button>1</Button>
</StackPanel>
</Window>
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