Tutorial: Using the Callable File Handler

In the following tutorial you will walk through creating a single COBOL program that directly calls the File Handler API (often referred to as the Callable File Handler) to perform a number of file handling operations. The program will demonstrate how to perform a number of File Handling operations without the need to use the conventional COBOL file handling statements such as SELECT, OPEN, READ, and CLOSE.

By the end of the tutorial, you should have created a COBOL program that is similar to the one found in Appendix A, and running it will:

• Create an indexed file.
• Write a number of records to the file.
• Close the file.
• Rewrite an existing record and display the results