Format of NESL Consumer Event Control Block (CECB):
Offset	Size	Description	)
 00h	WORD	CECB_MajVer  Major Version of this structure (=1)
 02h	WORD	CECB_MinVer  Minor Version of this structure (=0)
 04h	DWORD	CECB_NextConsumer   -> next CECB.  NULL if last.
 08h	DWORD	CECB_ClassName	    -> ASCIZ string identifying event
					  class (see #03025)
 0Ch	DWORD	CECB_NotifProc	    -> FAR CALL event handler (see #03023)
 10h	WORD	CECB_OSILevel
		Bits 4-7 = OSI Layer of this module (1 through 7)
		Bits 0-3 = relative ordering with other modules on same layer
 13h 14 BYTEs	CECB_Reserved (all zeros)
Note:	Although the event consumer provides the memory for the CECB, the
	  NESL module controls this memory until the consumer is de-registered.
	While owned by NESL, this structure should be treated as read-only,