WPF application programming with VB.Net (menus)

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Any ideas on websites or material that can guide me through creating a WPF application in VB.Net.
This is my first time using this and I am not sure how to add functions to my controls for example this is my WPF code:

<pre lang="HTML"><Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="481" Width="675" DataContext="{Binding}">
    <Grid>
        <Menu Height="27" HorizontalAlignment="Left" Margin="2,0,0,0" Name="Menu1" VerticalAlignment="Top" Width="651">
            <Menu.Background>
                <LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
                    <GradientStop Color="Black" Offset="0" />
                    <GradientStop Color="White" Offset="0.058" />
                </LinearGradientBrush>
            </Menu.Background>
            <MenuItem Header="File" Name="File">
                <MenuItem Header="New File" Command="ApplicationCommands.New" IsCheckable="True"  />
                <MenuItem Header="Open" Command="ApplicationCommands.Open" IsCheckable="True" />
                <MenuItem Header="Save" Command="ApplicationCommands.Save" IsCheckable="True" />
                <MenuItem Header="Save As" Command="ApplicationCommands.SaveAs" IsCheckable="True" />
                <MenuItem Header="Close" Command="ApplicationCommands.Close" IsCheckable="True" />
            </MenuItem>
            <MenuItem Header="Setup" Name="Setup">
                <MenuItem Header="Customer information" IsCheckable="False" IsEnabled="False" />
                <Separator />
            </MenuItem>
            <MenuItem Header="Reports" />
            <MenuItem Header="Calculation tools" />
        </Menu>
        <Image Height="126" HorizontalAlignment="Left" Margin="246,157,0,0" Name="Image1" Stretch="Fill" VerticalAlignment="Top" Width="189" Source="/WpfApplication1;component/Images/Baker%20Blue%20and%20black.jpg" />
        <Grid.Background>
            <LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
                <GradientStop Color="Black" Offset="0" />
                <GradientStop Color="#FFB5FFF9" Offset="0.512" />
            </LinearGradientBrush>
        </Grid.Background>
    </Grid>
</Window>

Now on my menu bar I have the navigations functions in Place but do not know how to make the menu items actually navigate.

Example a Windows for application that allow me to click on the menu and navigate to form2 in plain VB I would simply enter the following code:

Private Sub InventorySteupToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles InventorySteupToolStripMenuItem.Click
        'Inventory setup directory
        Inventory.Show()
        Inventory.MdiParent = Me
    End Sub

Not sure how to make the two tak to each other. Plese help.