For various programming languages, the installation of List & Label contains declaration files as well as examples. You will find these files in the corresponding sub-directories of your List & Label installation. Follow the documentation of your programming language to include DLL's via API or OCX/ActiveX components.
If your programming language is not included, you can create a declaration file on your own by following the appropriate steps for your programming language. Your programming language just needs to support invoking an API via calling DLL functions.
In case of doubt, please contact our support.