OS/400 API concepts

The APIs are directly callable from high-level language programs. They allow you to:

• Provide better performance when getting system information or when using system functions provided by control language (CL) commands or file support.
   
• Use system information and functions that are not available through CL commands.
   
• Use calls from high-level languages to these interfaces.

These links explain how to use OS/400 APIs:

• Language selection considerations

• Data types and parameter coding

• User space format for list APIs

• API error reporting

• Open list information structure

• Path name format

• POSIX thread API concepts

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