)
Values for ECB completion code:
 00h	success
 ECh	remote terminated connection without acknowledging packet
 EDh	abnormal connection termination
 EEh	invalid connection ID
 EFh	SPX connection table full
 F9h	event should not be cancelled
 FAh	cannot establish connection with specified destination
 FCh	cancelled
 FDh	malformed packet
 FEh	packet undeliverable
 FFh	physical error
SeeAlso: #03810,#03812