# Synopsis

MDA_PTR step_IsTFInExternalMap(long option, DDF_TF tf, MDA_PTR extmp_ptr)

# Purpose

Find tf in external map

# Description

The external map entity (extmp_ptr) is scanned looking for an entity that matches the specified type:form (tf). If the matching type:form is found, the database pointer of the entity will be returned. Otherwise MDA_NULL_PTR will be returned if a match is not found.

# Input

## option

Not used

## tf

Type:Form to find in external map

## extmp_ptr

Database pointer of external map entity

# Return

Database pointer of entity or MDA_NULL_PTR if not found