z/OS Communications Server: SNA Programming
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MODCB macroinstruction

z/OS Communications Server: SNA Programming
SC27-3674-00

MODCB modifies the contents of an existing ACB, NIB, RPL, or EXLST. To use MODCB, this information is specified:
  • The access method (VTAM®)
  • The kind of control block to be modified
  • The symbolic name of the control block or a register that contains the address of the control block
  • The fields to be modified.

A common use of MODCB is to modify an NIB during execution of a LOGON exit routine. Here are some examples:

Parent topic: Using manipulative macroinstructions

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