Create new EXE for a changed DLL and make corresponding changes to Java/JS code

We have a Java/Javascript application running on Glassfish that is calling an external exe file for calculations. What needs to be done is: C++ part: Our java application is using a dll that is wrapped in an exe. The java application calls the exe with a set of parameters and the exe returns a value. Recently the dll has been changed. We need to update the exe to reflect the new dll, that has now one more parameter. We have the old borland c++ project that we used for this. Java part: The java side works like this: Client select a product on the website. In an xml file are written what parameters need to be used for what product. So in this xml is found the parameters for the product the client selected on the website. The input from client on the website + parameters from the xml are send to the exe. The result of the exe will than be displayed on the screen. The change is that the xml file needs one extra column. This column contains the value for the extra parameter in the dll(exe). Javascript part: The use can change the parameters in the table. This is done using a web interface, created with Ext-Js. The change here is that the table for editting the xml file with parameters, needs one more column, where this new value can be editted. So also the corresponding Java methods for update, add or delete product should be changed