>It would be nice to drag/drop an instance of the control on a form and now modify the behavior using the above 'empty' template.

In my opinion, you should try for something like this:

*** ActiveX Control Event ***
DO CASE
* Handle each event or error.
	* Events
	Case THIS.CommEvent = 1
		* SThreshold # of Characters to Transmit.
		this.OnNumberOfCharactersToTransmit()
	Case THIS.CommEvent = 2
		* RThreshold # of characters Received.
		this.OnCharactersRecieved()
	Case THIS.CommEvent = 3
		* Change in the CTS line.
		this.OnChangeCTS()

	*** ECT ECT

ENDCASE

Everyone of your case statements is handled by a method call which hides the actual implemenation of the ActiveX control. Now, you can add an instance of that class to your form, and isntead of worrying about the CommEvent property or case statements, you can just override the method(s) you want.

Does that make sense?