Referring to Variable

I'm trying to work out how to refer to a Variable using another variable and text.

I know if i was referring to a control in my userform it would be

Me.Control(SpinName & "_Imp")

Here is what i'm trying to do. Depending on what spin button i press (Brand or Product):

Dim Brand_1_Imp As Double
Dim Product_1_Imp As Double
Dim CurrAttImp As Double
Dim SpinName As String

Brand_1_Imp Worksheets("Sheet1").Range("C16")
Product_1_Imp Worksheets("Sheet1").Range("C17")

SpinName = PredictionTool.ActiveControl.Name
CurrAttImp  = SpinName & "_Imp"

It doesn't like it when i try to assign the SpinName variable and text to CurrAttImp.

Hope that makes sense.