Combobox Number As Variable

Hi, there!

I have a following problem i need to solve:
Let's say i have a form with 16 Comboboxes.

I have a function to find unique values, sort them ascending and fill in combobox. So, i would like to find out how could i send Combobox number as parameter?

The code so far is:

Private Sub CommandButton1_Click() 
    Dim FormCombo As Object 
    Dim Comb As Object 
     
     
    Set FormCombo = AddData.LineNumber 
    Call Sort_Combo_AZ(Sheets("ProductShot").Range("A4:A60000"), FormCombo) 
    AddData.CheckBox1.Value = True 
     
     
    Set FormCombo = AddData.ProductCode 
    Call Sort_Combo_AZ2(Sheets("ProductShot").Range("B4:B60000"), FormCombo) 
     
    For i = 1 To 16 
        Set FormCombo = AddData.ComboBox & i ' this is the part that doesn't work
        Call Sort_Combo_AZ(Sheets("ProductShot").Range("D4:D60000,F4:F60000"), FormCombo) 
         
    Next i 
     
     
    StartUp.Hide 
    AddData.Show 
     
End Sub 
 
Function Sort_Combo_AZ(AllCells1 As Range, FormCombo As Object) 
[some code]
End function

Thanks for your help!