TVTHeader.HandleMessage Method

General message handler for the header.

function HandleMessage(var Message: TMessage): Boolean; virtual;

The header gets here the opportunity to handle certain messages before they reach the tree. This is important because the tree needs to handle various non-client area messages for the header as well as some dragging/tracking events. By returning True the message will not be handled further, otherwise the message is then dispatched to the proper message handlers.

TVTHeader Class