When the list form of the PUTGET macro instruction expands, it builds a four-word PUTGET parameter block (PGPB). This PGPB combines the functions of the PUTLINE and the GETLINE parameter blocks and contains information used by the PUT and the GET functions of the PUTGET service routine. The list form of the PUTGET macro instruction initializes this PGPB according to the operands you have coded in the macro instruction. This initialized block, which you can later modify with the execute form of the PUTGET macro instruction, indicates to the PUTGET service routine the functions you want performed. It also contains a pointer to the output line descriptor that describes the output message, and it provides a field into which the PUTGET service routine places the address of the input line returned from the input source.

You must pass the address of the PGPB to the execute form of the PUTGET macro instruction. Because the list form of the macro instruction expands into a PGPB, all you need do is pass the address of the list form of the macro instruction to the execute form as the PARM value.

The PUTGET parameter block is defined by the IKJPGPB DSECT, which is provided in SYS1.MACLIB. Table 1 describes the contents of the PUTGET parameter block.