I have a user control that consists of four overlapping items: 2 rectangles, an ellipse and a lable

<UserControl x:Class="UserControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Width="50.1" Height="45.424" Background="Transparent" FontSize="24">
<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="3.303*" />
        <RowDefinition Height="40*" />
        <RowDefinition Height="2.121*" />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="5.344*" />
        <ColumnDefinition Width="40.075*" />
        <ColumnDefinition Width="4.663*" />
    </Grid.ColumnDefinitions>
    <Rectangle Name="Rectangle1" RadiusX="5" RadiusY="5" Fill="DarkGray" Grid.ColumnSpan="3" Grid.RowSpan="3" />
    <Ellipse Name="ellipse1" Fill="{Binding State}" Margin="0.016,0.001,4.663,0" Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2" Stroke="Black" IsEnabled="True" Panel.ZIndex="2" />
    <Label Name="lblNumber" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Foreground="White" FontWeight="Bold" FontSize="24" Grid.Column="1" Grid.Row="1" Padding="0" Panel.ZIndex="3">9</Label>
    <Rectangle Grid.Column="1" Grid.Row="1" Margin="0.091,0,4.663,0" Fill="Blue" Name="rectangle2" Stroke="Black" Grid.ColumnSpan="2" Panel.ZIndex="1" />
</Grid>

Here is my business object that I want to control the state of my user control:

Imports System.Data

Imports System.ComponentModel

Public Class BusinessObject Implements INotifyPropertyChanged 'Public logger As log4net.ILog

Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged

Private _state As States
Public Enum States
    State1
    State2
    State3
End Enum

Public Property State() As States
    Get
        Return _state
    End Get
    Set(ByVal value As States)
        If (value <> _state) Then
            _state = value
            RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs("State"))
        End If

    End Set
End Property

Protected Sub OnPropertyChanged(ByVal name As String)
    RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(name))
End Sub

I want to be able to change the state of a business object in the code behind and have that change the colors of multiple shapes in my usercontrol. I'm not sure about how to do the binding. I set the datacontext of the user control in the code behind but not sure if that's right. I'm new to WPF and programming in general and I'm stuck on where to go from here. Any recommendations would be greatly appreciated!!