IBM Version 4 manual Programming errors and refers you to, That show you how to avoid Errors, Task

Chapter 9. Common API Programming Errors

This chapter contains information identified as common programming errors encountered when using APIs within application programs. The chapter de provides two program examples for each common error. The first progra example is incorrectly coded and is followed by the correctly code encounter errors or problems while working with APIs, these examples ma ideas or solutions.

Note: Do not assume that an API will do things otherSystemthan APIwhat the Referencementions. If the manual does not saythatspecificallyit is allowed, it probably is not.

Figure 9-1		identifies common					API	programming errors and refers you to
that show you how to avoid the									errors.
Figure	9-1. Common			Programming Errors
Task							Location	of	Example
Using the error code						paramPage-		9-2
eter
Defining		data		structures			Page	9-5
Defining		receiver			variablesPage			9-10
Defining		list		entry	formatPage			9-14
lengths
Using	null		pointers		with		OPMPage	9-18
APIs
Defining		byte		alignment			Page	9-22
Using offsets in user spPagece								9-27
Coding	for		new function				Page	9-36

 Copyright IBM Corp. 1997 9-1