If the client application sends variable text, Open ServerConnect (if TRS is used) or MainframeConnect (if Access Service Library is used) places:
The address of the variable text in SPVARTXT
The length of the variable text in SPVARLEN
If the client application does not pass any arguments, Open ServerConnect sets SPVARTXT and SPVARLEN to 0.
See Chapter 5, “Testing and invoking an RSP” for details on sending variables and data from the client application.
