Application VisualBasic Script

Sub Make()
    Dim TBar As commandBar
    Dim NewDD As CommandBarControl
    Set TBar = CommandBars.Add
    Set NewDD = CommandBars("myBar").Controls.Add(Type:=msoControlDropdown)
    With NewDD
        .Caption = "Date"
        .OnAction = "yourAction"
        .Style = msoButtonAutomatic
        For i = 1 To 2
            .AddItem "Click"
        Next i
        .ListIndex = 1
    End With
End Sub
Sub yourAction()
    With CommandBars("MonthList").Controls("DateDD")
        ActiveCell.value = .List(.ListIndex)
    End With
End Sub