How to reference/set a checkbox value

So I had several form-based checkboxes and I can't seem to reference them or change their value in VBA. Perhaps I'm simply not referencing them correctly. I'm currently trying:

Private Sub SundayNoonBox_Click()
    If 1 = MondayNoonBox.Value Then
        TuesdayNoonBox.Value = 1
    Else
        TuesdayNoonBox.Value = 0
    End If
End Sub

Also, it appears that code like this won't run unless it's in the Sheet1 code block and not in a Module code block? (Also, you have to be in Design Mode to delete a module, apparently.)