View source for ASYNC SETBREAKOFF

{{DISPLAYTITLE:ASYNC_SETBREAKOFF}}
This function sets the break off.
;Category:IOCTL_ASYNC (01h)
;Function:ASYNC_SETBREAKOFF (45h)

==Parameter Packet Format==
None. Packet pointer must be NULL.

==Data Packet Format==
{|class="wikitable"
!Field||Length||C Datatype
|-
|COM Error WORD (COMERR)||WORD||USHORT
|}

;COM Error WORD (COMERR):The physical device driver returns this information if a general failure error is not reported. See "Function 6Dh - Query COM Error" for COMERR definition. The COM device error information is not cleared by this action.

==Returns==
If the call is made with an invalid Parameter Packet pointer and a general failure error is reported, this function is not performed and valid information is not returned in the Data Packet.

==Remarks==
If a general failure is not returned, then the physical device driver stops generating a break signal. It is not considered an error if the physical device driver is not generating a break signal. The physical device driver then resumes transmitting characters, taking into account all the other reasons why characters might be transmitted.

[[Category:IOCtl Function]]