Messaging=========Inter-Application Messaging---------------------------The details of messaging are depicted under ProcessManagement::BApplication.Drag-and-drop-------------Methods-------Messaging with the app_server is not done using BMessages because of theoverhead required to send them costs time and speed. Instead, ports areutilized indirectly by means of the PortLink class, which simply makesattaching data to a port message easier, but requires very littleoverhead.