Hi John.

2) Can an ActiveX control be subclassed? If so, how?

In addition to what David and Sergey have told you, we have created a bunch of useful activeX subclasses for you in Chapter 9 of MegaFox: 1002 Things You Wanted to Know About Extending VFP

How do I include ActiveX controls in a VFP Application?
How do I find out what controls are in an OCX?
OK, but how do I get the class name of an ActiveX Control?
How do I add an ActiveX control to a form or class?
Putting ActiveX controls to use
How do I sub-class an ActiveX control? (Example: CH09.vcx::xprogbar)
How do I use the Windows progress bar? (Example: CH09.vcx::xTherm; frmprogbar.scx)
Setting up the progress bar class
Displaying the progress bar
How do I use the Date and Time Picker? (Example: CH09.vcx::acxDTPicker and DateTimePicker.scx)
So what is the checkbox property for?
How does the custom acxDTPicker class work?
How do I use the MonthView? (Example: CH09.vcx::acxMonthView and MonthView.scx)
How do I use the ImageList?
How do I store images in the ImageList?
How do I bind the ImageList to other controls?
How do I use the ListView?(Example: CH09.vcx::acxListView and ListView.scx)
How do I add items to my ListView?
How do I sort the items in my ListView?
How do I know which item is selected?
How do I make the ListView behave like a data-bound control?
How do I use the ImageCombo?(Example: acxImageCombo and ImageCombo.scx)
How do I display a hierarchical list in the ImageCombo?(Example: ImageComboTree.scx)
How do I use the TreeView?(Example: CH09.vcx::acxTreeView and TreeView.scx)
How are nodes added to the TreeView?
How do I navigate the TreeView?
How does the acxTreeView class work?
How are the nodes managed?
How are the context sensitive menus managed?
Conclusion
How do I synchronize a TreeView with a ListView(Example: TreeAndList.scx)
Controls for animation and sound
How do I animate a form?
The ‘copying files’ dialog class (Example: CH09.vcx:: xCopyFile)
Using the copying files dialog (Example: frmAVICopy.scx)
How do I add sound to my application?
Sub classing the multimedia control (Example: CH09.vcx:: xMMedia)
Using the multimedia control (Example: frmMMedia.scx)
How do I use other types of media in my application?
Sub classing the media player control (Example: CH09.vcx:: xMPlayer)
Using the media player control (Example: frmMPlayer.scx)
How do I add a status bar to a form? (Example:frmsbastd.scx)
Setting up a standard status bar (Example:ch09.vcx::sbastd)
What’s the point of the simple style status bar? (Example: frmsbabase)
Managing the status bar dynamically (Example: frmsbacus)
Conclusion
What is the winsock control?
So which protocol is best?
How do I include messaging in my application? (Example: imdemo.prg)
Setting up a messaging form
Extending the example
How do I transmit error reports without using E-Mail?
The client definition (Example: tcpclient.prg)
The Server definition (Example: CH09::xtcpServer)
Conclusion
ActiveX controls, the last word