Dialog type. Source plug-ins can be edited in the Property Editor or the Contents Editor, while effect plug-ins can only be edited in the Effect Editor.
Main plug-in dialog. This is the dialog used in the Property Editor for source plug-ins, and in the Effect Editor for effect plug-ins.
Contents Editor dialog. This is the small dialog used in the Contents Editor for source plug-ins.
AudioPlugin.h の 330 行目に定義があります。