DAX4: What's new in Delphi 4's ActiveX framework

DAX class framework changes:

• TAutoObject supports events. A bunch of code from TActiveXControl has migrated to its superclass TAutoObject.
• Threading model support in COM objects (and their descendants). Base classes are thread-safe.
• Object Safety, PropertyBagPersistence, and QuickActivation are built into ActiveX controls (and ActiveForms).
• ActiveX Controls expose their ClientSite as a property.
• ActiveX Controls (like other COM object) support threading model. The default threading model is Apartment.
• ActiveX controls works much better with IE4 (thanks to apartment threading & a few workarounds).
• ActiveX controls support IDataObject for embedding into Office apps.
• MTS support, and changes to COM objects to support this (including threading models and start-suspended support).

• The automation object wizard generates events.
• COM Object wizard generates a vanilla COM object.
• MTS object wizard.

I didn't get a really in-depth look, but here are some things I noticed:

• no longer barfs on OPOS Release method.
• Generates regular IDL, Pas/IDL, or Corba IDL.

CORBA support and COM support appear to be integrated at the server level, so it appears to be possible to create a server that can serve both CORBA and COM clients.