• Writing a Subroutine
• Compiling and Storing a Subroutine
• Testing the Subroutine
• Using a Custom Subroutine: The MTHNAM Subroutine
• Subroutines Written in REXX

You can create custom subroutines to use in addition to the functions provided by Information Builders. The process of creating a subroutine consists of the following steps:

• Writing a subroutine using any language that supports subroutine calls. Some of the most common languages are FORTRAN, COBOL, PL/I, Assembler, and C. For details, see Writing a Subroutine.
• Compiling the subroutine. For details, see Compiling and Storing a Subroutine.
• Storing the subroutine in a separate file; do not include it in the main program. For details, Compiling and Storing a Subroutine.
• Testing the subroutine. For details, see Testing the Subroutine.

Note: On z/OS, all subroutines called by WebFOCUS must be fully LE compliant.