windows-installation-and-configuration-guide/apl-exit-codes/ needs updating

[dyaandys]

2026-05-06 v20.0:662a331439

APL exit codes are defined in svn/apl/allos/src/exitcodes.h. 21.0 (and really 20.0) need:

12: HMON load failure
13: HMON initialisation failure

The last sentence should therefore read "Dyalog recommends using values greater than 13 for this purpose."

I think that that last note on the page "APL applications can generate a custom return code by specifying an integer value to the right of ⎕OFF. Dyalog recommends using values greater than 12 for this purpose." should actually be before the table .. it is quite an important point.

Can we also make the ⎕off a hyperlink to language-reference-guide/system-functions/off/

See also #810.

[FionaDyalog]

Link to ⎕OFF: /language-reference-guide/system-functions/off/

Confirmed that these codes were added in Dyalog v20.0 (the Dyaklog v20.0 should also be updated).

[dyaandys]

The text at start of the page is currently:
When APL or a bound .EXE terminates, it returns an exit code to the calling environment. If APL is started from a desktop icon, the return code is ignored. However, if APL is started from a script (UNIX) or a command processor, the exit code is available and may be used to determine whether or not to continue with other processing tasks. The return codes are:

I think better would be
When APL or a bound .EXE terminates, it returns an exit code to the calling environment. If APL is started from a desktop icon, the return code is ignored. However, if APL is started from a script (UNIX) or a command processor, the exit code is available and may be used to determine whether or not to continue with other processing tasks. Additionally, APL applications can themselves return their own exit codes by calling ⎕off followed by an integer (see ⎕off for more details). The interpreter's own exit codes are: