The generic function dde-server-poke is called in response to a poke transaction. A method specializing on the classes of server and topic should poke the data given by data into the item specified by item .
The keyword format indicates the format in which the item is being requested. By default, only text transfers are supported (and the format argument will have the value :text ).
The set of supported formats may be extended in future releases, so applications should always check the value of the format parameter and reject transactions which use formats not supported by the application.
If the poke transaction is successful, non- nil should be returned, and nil should be returned for failure.