History Combo Control
COXHistoryCombo 
Ultimate ToolBox COXHistoryCombo class  is derived from the MFC class CComboBox. It is a combo box which keeps a history of the previously entered values. It can also show a small toolbar with Add and Delete buttons. Because this control will often be used to enter file paths an extra button can be used to browse for a file name.

Features:
•	COXHistoryCombo is derived from the standard CComboBox 
•	Can be used instead of an edit control to support a history 
•	The combo box automatically remembers previous values entered or selected by the user 
•	Handy control in places where the user has to enter a file path 
•	Can show additional buttons : FileOpen, Add, Delete etc. 
•	Additional buttons support tooltips 
•	Can be edited by the user, by clicking the add/delete button 
•	Has persistent contents which can be stored in between different runs of your program 
•	Easy to use in your dialog (just subclass a combo control) 
•	All standard notification messages are available