Passing parameters to OnAction function of a CommandBarComboBox

I am creating a dynamic CommandBarComboBoxes on a new Word document CommandBar. My problem is catching the currect ComboBox the user clicked on. Is there a way to pass arguments to the OnAction property of the CommandBarComboBox control. Remember, it is all done dynamically.
Thanks in advance,
Ilan.

The ActionControl property returns the control that called the sub by OnAction.

VB Code:

Sub AddMyCombo()
    
    Dim combo As CommandBarComboBox
    Set combo = CommandBars("Custom 1").Controls.Add(msoControlComboBox)
    With combo
        .AddItem "First Item", 1
        .AddItem "Second Item", 2
        .DropDownLines = 3
        .DropDownWidth = 75
        .ListIndex = 0
        .Tag = "MyNewCombo"
        .OnAction = "MySub"
    End With
 
End Sub
 
Sub MySub()
 
    With CommandBars.ActionControl
        MsgBox .Tag & " = " & .List(.ListIndex)
    End With
 
End Sub

:)

Very helpful and to the point.