Checked vs CheckState

If you have Option Strict On, your first line won't compile: the Checked property is Boolean, so it may only be True or False. CheckState, on the other hand, may contain any of the three CheckState enumeration values: Checked, Unchecked, or Indeterminate. The Checked property returns True if CheckState is anything but Unchecked. For more information, see http://msdn.microsoft.com/library/en-us/cpref/html/frlrfSystemWindowsFormsCheckBoxClassCheckedTopic.asp