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

Return `true` if this control manager has a default message handler installed, and `false` otherwise&period;

== Synopsis

Declared in `&lt;balb&lowbar;controlmanager&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
hasDefaultHandler() const;
----

== Return Value

`true` if a default handler is installed, and `false` otherwise


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