Classes defining the CheckBox placed beside list items in a CheckList TCustomCheckListBox - base class for TCheckListBox, the box found on CheckLists Create a new instance of TCustomCheckListBox Checked - True if the box with the specified Index has been checked TCheckListBox - the box found beside each item on a CheckList Allows multiple selected list items. Toggle the checked/unchecked state of this box AllowGrayed - if True, the box is allowed to be greyed, and impossible to select The State of the box with the specified index - checked, unchecked or greyed OnClickCheck - event handler for a mouse click on the CheckBox OnItemClick - event handler for a mouse click on the data item associated with the checkbox