ICETOOL can be called from an assembler program using the LINK, ATTACH, or XCTL system macros. Standard linkage conventions must be used. When ICETOOL finishes processing, it returns to the calling program with register 15 set to the highest operation return code encountered. See ICETOOL return codes for an explanation of the ICETOOL return codes.

When you call ICETOOL from a program, you have a choice of two different interfaces: the TOOLIN Interface and the Parameter List Interface.