Private Sub UserForm_Initialize()
Me.Height = 70
ComboBox1.List = Array(1, 2, 3)
ComboBox2.List = Array("aaa", "bbb", "ccc")
ComboBox3.List = Array(111, 222, 333)
End Sub
Private Sub ComboBox1_Change()
Me.Height = IIf(ComboBox1.ListIndex < 0, 70, 240)
End Sub