TBaseVirtualTree.OnGetHelpContext Event

Miscellaneous event.

property OnGetHelpContext: TVTHelpContextEvent;

This event is usually triggered when the user pressed F1 while the tree has the focus. The tree is iteratively traversed all the way up to the top level parent of the given node until a valid help context index is returned (via this event). When the loop reaches the top level without getting a help index then the tree control's help index is used. If the tree itself does not have a help context index then a further traversal is initiated going up parent by parent of each control in the current window hierarchy until either a valid index is found or there is no more window parent.

TBaseVirtualTree Class