




 
The generic function 
dde-server-request
 is called in response to a request transaction. A method specializing on the classes of 
server
 and 
topic
 should return the data in 
item
.
The expected format of the data is given by 
format
, which defaults to 
: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.