PDFSharp - Using a variable instead of the color name?

[Rocky48]

I did not show the whole code as all I was asking is HOW you write a variable as the property of XBrushes, as it only accepts the name of the color property. i.e. Black
The color combo is bound into the combobox with the following set:
Display member: Color
Value Member: XID

The following code is run to select the color in the combo box:

 Private Sub cboColor_SelectedIndexChanged(sender As Object, e As EventArgs) Handles cboColor.SelectedIndexChanged
        Me.TxtColorTableAdapter.Fill(Me.ColorDataSet.TxtColor)
        Dim TxtColorValue As Integer
        Dim cboColor As Object = Nothing
        TxtColorValue = cboColor.selectedvalue
    End Sub

So the question I am asking is how do I represent the color for the XBrushes property instead of a color?

I have another problem at the moment in the Application Designer.vb which I will post separately.