# Synopsis

(macro) DDF_TF * step_GetEntitySubtypes(DDF_TF tf)

# Purpose

Get direct subtypes for a specified entity typeform.

# Description

A pointer to the direct subtype list for the entity TF tf in the current STEP ddf is returned. Since this macro simply returns the location of the entry in the DDF, care must be taken to not change the information at the returned location. Use step_GetEntitySubtypeCount to obtain the number of entries in the list.

# Input

## tf

Entity TF whose subtypes are to be found

# Return

Subtype list for TF or NULL