[#BloombergLP-balb-ControlManager-deregisterUsageHandler]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balb.adoc[balb]::xref:BloombergLP/balb/ControlManager.adoc[ControlManager]::deregisterUsageHandler
:relfileprefix: ../../../
:mrdocs:

Deregister the callback function previously registered to handle "HELP" messages (see `registerUsageHandler`). Return 0 on success or a non‐zero value otherwise.

== Synopsis

Declared in `<balb_controlmanager.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
deregisterUsageHandler();
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#