Untitled

<Window.Triggers>
            <EventTrigger RoutedEvent="UIElement.PreviewMouseLeftButtonDown" SourceName="BTNclose">
                <BeginStoryboard Storyboard="{StaticResource waaragud}"/>
            </EventTrigger>
            <EventTrigger RoutedEvent="UIElement.PreviewMouseLeftButtonDown" SourceName="BTNexpand">
                <BeginStoryboard Storyboard="{StaticResource balikoy}"/>
            </EventTrigger>
        </Window.Triggers>