Network Programming for Microsoft Windows (Microsoft Professional Series)
NCBCANCEL
This command cancels a previous outstanding command. The ncb_buffer field points to the NCB structure with the operation that you want canceled. Canceling an NCBSEND or NCBCHAINSEND command aborts the session; however, aborting their no-ack variants does not cancel their respective sessions. The following commands cannot be canceled: NCBADDGRNAME, NCBADDNAME, NCBCANCEL, NCBDELNAME, NCBRESET, NCBDGSEND, NCBDGSENDBC, and NCBSSTAT. Table 22-5 describes the characteristics of the NCBCANCEL command.
| Field | In/Out | Required |
| ncb_command | In | X |
| ncb_retcode | Out | |
| ncb_lsn | ||
| ncb_num | ||
| ncb_buffer | In | X |
| ncb_length | ||
| ncb_callname | ||
| ncb_name | ||
| ncb_rto | ||
| ncb_sto | ||
| ncb_post | ||
| ncb_lana_num | In | X |
| ncb_cmd_cplt | Out | |
| ncb_event |