An infopop is a small window associated with a particular SWT widget in a plug-in's user interface. It displays context-sensitive help and links to related help topics for the widget. It is activated when the user puts focus on the widget and presses the F1 key.
To associate an infopop with a widget, you must first assign a context ID to the widget and then provide the description and links for the infopop. Here is an infopop that has been defined on a workbench preferences page: