Using DDEApp Client (Step-by-step Instruction)ĭDEApp Client on the other hand is used for send command and request to Servers. Your DDEApp Server is all set and ready for action.
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No client message will be processed in Offline mode. Ready for Actionįinally, you may use Online() and Offline() to enable / disable DDEApp Server when required. Exception thrown during DDEApp operation will be translated to message and forwarded to the client who initiates the operation. Please note that all user interactive action and message box prompt should be switched off when application operates in DDEApp Server mode as any message box will freeze the server application. ddeServer->RegisterVariable(, , ) Įvent OnFunctionCall must be assigned to process registered function whereas OnVariableRead and OnVariableWrite must be assigned to process variable read / write operation. Set flag to true for read only access for clients. Variable type are defined as DDEVARTYPE which currently support types integer ( dvInt), double ( dvDouble) and string ( dvAnsistring, dvString). Thus, we need to tell DDEApp Server what are the functions and variables that can be access by DDEApp Clients.Ĭall RegisterFunction() / RegisterVariable() to expose application’s function and variable for client access. However, DDEApp Server has yet to have any information on functions and variables from your application. All built-in internal functions are ready for action. It can now respond to DDEApp Client’s request. Void DdeServer_ClientConnected( object sender, DdeAppEventArgs e) Register Functions and VariablesĭDEApp Server is ready for action after these two steps. New EventHandler(DdeServer_ClientConnected) Refer to programmer’s reference for list of events available. DdeAppServer ddeServer = DdeAppServer.SingleInstance( this) Assign EventĪssign event functions to get notified for DDEApp Server events. MDDEApp_Server ddeserver = MDDEApp_Server::SingleInstance( this) Only one server instance is allowed for each application. InitializeĬall constructor to instantiate DDEApp Server. It can handle request from multiple clients but only one request can be processed each time. Using DDEApp Server (Step-by-step Instruction)ĭDEApp Server is designed to “serve” DDEApp Client request. NET framework to provide a bridge between. This library was first designed to simplify and standardize DDE implementation for applications built on Borland C++ platforms. DDEApp is an application communication framework based on DDE communication protocol in order to exchange information between applications.
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