_Added in 1.9.4_

*$isdde(name)*

Returns [[$true]] if the specified [[DDE]] service name is in use, otherwise [[$false]].

*Parameters*

table(ktable).
|*Parameter*|*Description*|
| name | The [[DDE]] service name to check. |

*Example*

<pre>
//echo -ag AdiIRC $iif($isdde(Adiirc),is,is not) a DDE service.
</pre>