WPF usercontrol wont work.

[LucasOschip]

The problem im having is that when i try to set the property "Percentage " in a separate project it wont set the property.

Heres the source code of both projects:

UIProgressBar - This is the Usercontrol

 Public Class UIProgressBar
    Public Property Percentage
        Get
            Return ReturnPercentageWork()
        End Get
        Set(ByVal value)
            SetPercentageWork(value)
        End Set
    End Property
    Private Function ReturnPercentageWork()
        Dim Percentage_Return As Boolean = FillRec.Width / 2
        Return Percentage_Return
    End Function
    Private Sub SetPercentageWork(ByVal value As Double)
        Dim Percentage_Set As Double = value * 2
        FillRec.Width = Percentage_Set
    End Sub
End Class

This is the other project:

Class MainWindow 
 Private Sub MainWindow_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles Me.Loaded
        Dim UIPB As New UICore.UIProgressBar
        UIPB.Percentage = 100
        Grid1.Children.Add(UIPB)
    End Sub
 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles Button1.Click
    End Sub
End Class

Please help if you can. :)