[#DH_set_ex_data]
= DH_set_ex_data
:mrdocs:

Store application data on a DH object at a CRYPTO_EX index (deprecated).

== Synopsis

Declared in `<openssl/dh.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
DH_set_ex_data(
    xref:DH.adoc[DH]* d,
    int idx,
    void* arg);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *d*
| DH object to update.
| *idx*
| Index from DH_get_ex_new_index().
| *arg*
| Application pointer to store (may be NULL).
|===


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