BCGControlBar Pro for MFC
BOOL CBCGPToolbarComboBoxButton::DeleteItem ( LPCTSTR  lpszText)

Deletes an item for the combo box.

TRUE if the item was located and deleted successfully; otherwise FALSE.

Call this function to delete an item from the combo box.

lpszTextSpecifies the text of item to be deleted. If there is a couple of items with the same text, the first of them is deleted.