OpcDbGateway is a software package (configurator and runtime) dedicated for automation and industrial control system or office applications integration service providers. It can be used not only in manufacturing plants, building management systems, power stations, waste-water processing facilities, for connecting corporate and control systems, but also for integrating data from various sources in office applications.It has three main parts:-OPC client to communicate with external OPC servers-OPC server to provide handled data for external applications over OPC or web services or for graphical user interface provided by another our application OPCExplorer -soft controller for data and tasks handling It enables creating of easy or also very complex applications for data exchange between various data sources - OPC servers, OPC client applications, device communication drivers for external devices as sensors, actuators, programmable machines, data handling, monitoring, storing into process databases, creating trends, alarms, logging, reports, integrating to the on SOA (services oriented architecture) based systems.The system enables parallel running of tasks for data collecting and processing, working with process databases using built-in database functions or SQL commands, periodical or single-shot launching of external programs and scripts at specified time or according to specified conditions. The application based on OpcDbGateway can be created preferably by configuring using configurator with many powerful debugging features as historic trends wizard and OPC server address space mapping tool or by programming using external DLL modules. It is possible to program complex algorithms, special communication drivers within external DLL and then to add to the configured application part. The flexibility such a solution is enormous. Using of external DLL enables also third-party software integration - for example integration of communication driver