[#BloombergLP-ball-CategoryManager-lookupCategory-07]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/CategoryManager.adoc[CategoryManager]::lookupCategory
:relfileprefix: ../../../
:mrdocs:

Return the address of the non‐modifiable category named `categoryName`.

== Synopsis

Declared in `<ball_categorymanager.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/ball/Category.adoc[Category] const*
lookupCategory(char const* categoryName) const;
----

== Description

Return the address of the non‐modifiable category having the specified `categoryName`, possibly changed by the registered category name filter callback, in the registry of this category manager, or 0 if no such category exists.

== Return Value

address of the non‐modifiable category, or 0 if none exists

== Parameters

[cols="1,4"]
|===
| Name| Description
| *categoryName*
| name of the category to look up
|===


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