Hi Colin,
If you follow Andreas' advice and set down an ActiveX container control on your new SUDialog in the SUDialog editor his screenshot shows how to launch, you will be able to use that ActiveX control to display a dialog of all the currently registered AxtiveX objects that you could place inside the ActiveX container control.
Is this what you mean by "Visual Basic Libraries", or did you mean something else?
Brad Turpin
DIAdem Product Support Engineer
National Instruments