NAME
	ActivateCxObj -- change the activation state of a commodity object.
			 (V36)

   SYNOPSIS
	previous = ActivateCxObj(co,true);
	D0			 A0 D0

	LONG ActivateCxObj(CxObj *,LONG);

   FUNCTION
	Commodity objects of all types maintain an activation state.
	If an object is "active", then it performs its particular action
	whenever a commodity message arrives. If the object is "inactive"
	no action is taken, and the message goes on to its next destination.

	All objects are created in the "active" state except brokers
	which are created "inactive". Thus, after you create your
	broker and hang a tree of objects off of it, you must remember
	to use this function to activate it. This causes it to divert all
	messages to your tree of objects.

	This function activates 'co' if 'true' is different than 0. and
	deactivates it otherwise. The previous activation state is
	returned.

   INPUTS
	co - the commodity object to affect (may be NULL)
	true - 0 to deactivate the object, anything else to activate it

   RESULTS
	previous - the previous activation state: 0 if the object was
		   inactive or if 'co' was NULL, anything else if the object
		   was active

   SEE ALSO
	CxBroker()