1.2.2.4.4 Parameter(s)

I/O PCB or alternate PCB
Pointer to the PCB that represents the destination of the outgoing message.
AIB
Specifies the application interface block (AIB) that is used for the call. This parameter is an input and output parameter. The following fields must be initialized in the AIB:
AIBID Eyecatcher.
This 8-byte field must contain DFSAIBbb.
AIBLEN AIB lengths.
This field must contain the actual length of the AIB that the application program obtained.
AIBRSNM1 Resource name.
This 8-byte, left-justified field must contain the PCB name IOPCBbbb (if the TP PCB is used), or the name of an alternate PCB (if an alternate PCB is used)
AIBOALEN I/O area length.
This field must contain the length of the I/O area that is specified in the call list.
I/O Area
If provided, is a pointer to a buffer that is to be inserted as the first segment of next message.
MOD
Used for the output message, the 8-byte MOD name must be left-justified and padded with blanks as necessary.