Format of APPC/PC "Activate DLC" control block:
Offset	Size	Description	)
 00h 12 BYTEs	reserved
 0Ch	WORD	2B00h (verb "Activate DLC")
 0Eh  6 BYTEs	00h
 14h	DWORD	(big-endian) return code (see #03668)
 18h  8 BYTEs	(big-endian) DLC name
 20h	BYTE	adapter number