- Except for <STRONG>item_userptr</STRONG> (which returns <STRONG>NULL</STRONG> on error),
- each function returns one of the following:
-
- <STRONG>E_OK</STRONG> The routine succeeded.
+ The function <STRONG>item_userptr</STRONG> returns a pointer (possibly
+ <STRONG>NULL</STRONG>). It does not set errno.