Loading one User Control according the option selected

My aim is load an User Control in my view under user criteria selection.

My View:

<Window x:Class="OR_Management"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     Title="OR_Management" Height="300" Width="300"
    KeyDown="Window_KeyDown"    
               xmlns:local="clr-namespace:GIT_CuadroMando"><Window.Resources><ResourceDictionary><ResourceDictionary.MergedDictionaries><ResourceDictionary Source="/Assets/Styles.xaml"/></ResourceDictionary.MergedDictionaries></ResourceDictionary></Window.Resources><Grid><Grid.Background><LinearGradientBrush EndPoint="0.985,0.415" StartPoint="0.053,0.415"><GradientStop Color="#FF99B4D1" Offset="0"/><GradientStop Color="White" Offset="1"/></LinearGradientBrush></Grid.Background><local:SelecciondeVehiculo></local:SelecciondeVehiculo></Grid></Window>

Where

  <local:SelecciondeVehiculo></local:VehicleSelection> => VehicleSelection.xaml

  <local:UsersImplied></local:UsersImplied> => UsuImplied.xaml

  <local:ExpertActions></local:Exper.tActions> => ExpertAC.xaml

..

..

Code-behind:

Dim mVentanaOR As New Or_Management(1)

If mVentanaOR.ShowDialog = True Then

End If

OR_Management.XAML:

Public Class OR_Management

    Public Sub New(soption As Short)

        ' Llamada necesaria para el diseñador.
        InitializeComponent()
        If soption = 1 Then
           ''' JUST ASSIGN THE USER CONTROL NEEDED
'    VehicleSelection.xaml,UsuImplied.xaml, and so on

        End If
    End Sub

Primary platform is Windows 7 Ultimate 64 bit along with VS 2012/Sql2k8 for WPF/SilverLight projects.