Migrating a CRM system as part of an operating system update

The update to Windows 10 also requires updating the IDE to Delphi 10.2 and updating the libraries and tools used, such as DevExpress. Furthermore, new namespaces, changed method declarations and changed integer types have to be taken into account, so that the application can be compiled. Using switches for the contingent compilation also ensures the compilation on Windows 7 / Delphi XE, which is necessary for the transition.