xhwkclient/XHWK.WKTool/MinToolbar.xaml

<Window
    x:Class="XHWK.WKTool.MinToolbar"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    Title="MinToolbar"
    Width="20"
    Height="50"
    Margin="0"
    AllowsTransparency="True"
    Left="0"
    ShowInTaskbar="False"
    Top="0"
    Topmost="True"
    WindowStyle="None"
    mc:Ignorable="d">
    <Window.Background>
        <SolidColorBrush Opacity="0" Color="#00000000" />
    </Window.Background>
    <Viewbox>
        <Grid>
            <Border Background="White" CornerRadius="3">

                <Grid
                    x:Name="ButtonMin"
                    Width="3"
                    Height="25"
                    Margin="0.5"
                    MouseEnter="buttonMin_MouseEnter">
                    <Border
                        x:Name="BorderBlack"
                        Background="#2d8cf0"
                        BorderBrush="{TemplateBinding Control.BorderBrush}"
                        BorderThickness="0"
                        CornerRadius="3" />
                </Grid>
            </Border>

        </Grid>
    </Viewbox>
</Window>