USERVAR exit routine parameter list

VTAM® passes the following parameter list to the USERVAR exit routine in register 1, when the entry code in Register 0 is X'04'.

Note: For the sample USERVAR exit for TPF sessions, source code for this parameter list and the USERVAR parameters are within ELMCUVPL in SYS1.SISTMAC1.

Table 1. USERVAR exit parameter list for X'04'
Dec (Hex) offset	Size (Bytes)	Description
0 (0)	4	Address of an 8-byte user field
4 (4)	8	Reserved
12 (C)	4	Address of the invoke flags
16 (10)	4	Address of the USERVAR parameters

VTAM passes the following parameter list to the USERVAR exit routine in register 1, when the entry code in register 0 is X'10', X'18', or X'20'.

Table 2. USERVAR exit parameter list for X'10', X'18', and X'20'
Dec (Hex) offset	Size (Bytes)	Description
0 (0)	4	Address of an 8-byte user field
4 (4)	8	Reserved
12 (C)	4	Address of parameter string

For an activation, deactivation, and replacement function, offset X'C' can contain a parameter string, if you specify a value for the PARMS operand on the MODIFY EXIT command. The parameter string is only available for entry codes X'10', X'18', or X'20' in Register 0. The parameter string is in the form of a 2-byte length field followed by the actual data.