Some of the improvements of VFP7 Class/WinAPI/Interfaces supporting:
(I'll not copy&paste the help file - will mention some points of my wish-list that we have in VFP7)

SYS(3095)
SYS(3096)
DEFINE CLASS ... IMPLEMENTS InterfaceName
EventHandler()
Declare - DLL ... OBJECT ParameterType
SYS(2600)
HWND property

Also there is a lot of other stuff to do in VFPxx... hope that this 'xx' will be 7.1, like:
1. Define Class ... Abstract (or Define Interface) - this to enable "multiple" subclassing in VFP.
2. Precision of the Object model - to have one Base class (or interface) that is grand-parent of all standard FoxPro classes (this will posibly create issues with the BaseClass property)
3. specified...

Happy new year!