.. highlightlang:: us

.. index:: MapKeyExists

.. _mapkeyexists:

MapKeyExists
============

.. us.tag  MapKeyExists NOTREADYENGLISH Map_Get

Checks if a key already exists in the map.

.. function::  bool = MapKeyExists(hMap, ssKey)

.. us.return

**Return Value**

*bool* is TRUE (1) if the key already exists, otherwise FALSE (0).

.. us.params

**Parameters**

.. uparam:: hMap

   *hMap* Identifies the map.

.. uparam:: ssKey

   *ssKey* specifies the key that identifies the element to be looked up.

.. seealso::
   :ref:`overview-map`,
   :ref:`MapCreate`,
   :ref:`MapLookup`,
   :ref:`MapSetAt`

:sub:`id-763287`