Onmouse over submenu in WPF

hi all

  i am very new to WPF. how to create onmouse over submenu in wpf.

here is my menu.

<Grid><Menu IsMainMenu="True"  HorizontalAlignment="Left" Name="menu1" VerticalAlignment="Top" Width="800" ><MenuItem Header="Home" Width="60" FontSize="16"  FontFamily="Times New Roman"><MenuItem Header="Test" /></MenuItem><MenuItem Header="New Asset" Width="100" FontSize="16" FontFamily="Times New Roman" ><MenuItem Header="HardWare"><MenuItem Header="Desktop" /><MenuItem Header="Laptop"/><MenuItem Header="Printer" /><MenuItem Header="Scanner" /><MenuItem Header="BarCode Scanner" /></MenuItem><MenuItem Header="Software"></MenuItem></MenuItem><MenuItem Header="Asset Transfer" Width="130"  FontSize="16"  FontFamily="Times New Roman"/><MenuItem Header="Asset Tracking" Width="130" FontSize="16"  FontFamily="Times New Roman" /><MenuItem Header="Log out" Width="120" FontSize="16"  FontFamily="Times New Roman" /></Menu></Grid>

i wan to display submenu onmouse over event. how to do it. please help me out.

Thanks.