放置 WindowsFormHost ：

 <   StackPanel     Panel.ZIndex   =  2   名称跨度>  =  pnlLeftMenu   方向  = 水平   高度  =  400     Horizo​​ntalAlignment   = 左   保证金  =   -  150,0,0,0 >  
<  边框    BorderBrush   = ＃AF1719    BorderThickness   =   1   宽度  =  150   背景  = ＃4C808080   >  
<！ -    您的WindowsFormHost就在这里......    - >   
<   / Border  >  
<   Grid  >  
<  按钮   名称  =  btnLeftMenuHide   宽度  =  48   高度  =  48   点击  =  btnLeftMenuHide_Click   内容  = 隐藏   可见性  = 隐藏  /  >  
<  按钮   名称  =  btnLeftMenuShow    宽度  =  48   高度  =  48   单击  =  btnLeftMenuShow_Click   内容  = 显示  /  >  
<   / Grid  >  
<   / StackPanel  >  

I have a application like following article : Sliding Panel in WPF - Code Scratcher[^] .In main I create a in center position .when left panel is expanded ,panel left is under WindowsFormsHost.How to set WindowsFormsHost to over other lay out

What I have tried:

Please tell me any solution for my problem

Place your WindowsFormHost inside the Border control:

<StackPanel Panel.ZIndex="2" Name="pnlLeftMenu" Orientation="Horizontal" Height="400" HorizontalAlignment="Left" Margin="-150,0,0,0">
	<Border BorderBrush="#AF1719" BorderThickness="1" Width="150" Background="#4C808080" >
	    <!-- Your WindowsFormHost goes here... -->
	</Border>
	<Grid>
		<Button Name="btnLeftMenuHide" Width="48" Height="48" Click="btnLeftMenuHide_Click" Content="Hide" Visibility="Hidden"/>
		<Button Name="btnLeftMenuShow" Width="48" Height="48" Click="btnLeftMenuShow_Click" Content="Show"/>
	</Grid>
</StackPanel>