An instance of the DdeClient class represents the client side of a DDE conversation. Methods of DdeClient are available for connecting to a DDE server, requesting data items from the server, requesting links to data items (hotlink, warmlink, or coldlink), registering callbacks for data change and connection termination events, sending data items to a server, querying server capabilities, and requesting command execution by the server. A DdeClient can connect to any DDE server application, Smalltalk or otherwise, that supports the platform DDE protocols. An instance of DdeClient can connect to only one DDE server.