ActiveX Control extender properties

Can anyone list the ActiveX Control extender properties supplied by
Delphi Form?

Will this VB code in a VB ActiveX Control run on a Delphi Form?

Dim WithEvents frm as Form

'usercontrol_readproperties event
If TypeOf UserControl.Parent is Form then
    set frm = UserControl.Parent
end if

If that works, can I now get Delphi Form (container) events inside my
control as such:

Private Sub frm_Resize()
End Sub

Are there any sources for creating controls that run WELL in more than
one container when you need to interact with the container?