Null Reference Exception

[lordofscripts]

In your demo if you use the default value of the last parameter of CarClock constructor (or set it to false) then the demo will throw a NullReferenceException on setting the Location property of CarClock.ClockPanel

[Jonathan435]

The reason for that exception is that if BaseBar is required (last parameter set to true)
the Clock will be contained inside a panel (ClockPanel) hence, you must use ClockPanel insted of Clock
if last parameter set to false, ClockPanel will never be initialized and you must use Clock. in the example I use the ClockPanel Location in order to set the GoalsClock location, so if AddBaseBar is set to false, use Clock location. for example:

' AddBaseBar = false
        CarClock = New BusinessClocks.ExecutiveClocks.CarClock(300, 150, 0.8, False)
        CarClock.ShowInnerCutForPerformance = False
        CarClock.BarBackColor = Color.Pink
        CarClock.Create(True)
        Me.Controls.Add(CarClock.Clock) ' use Clock and not ClockPanel here

        GoalsClock = New GoalsClock(200, 200, 0.8)
        GoalsClock.Create(True)
        GoalsClock.Clock.Location = New Point(0, CarClock.Clock.Location.Y + CarClock.Clock.Height + 5) ' you dont need to add the bar height: + CarClock.ClockPanel.Height + 5, replace with clock height in order to get the Y point of the bottom of the clock
        Me.Controls.Add(GoalsClock.Clock)

I know it is confusing do you have a better solution rather than raising an exception?