Keep a maintainable baseline
- Preserve compiler updates, third-party VCL source and package order.
- Map database clients, reports, COM, APIs and device libraries.
- Test installer and standard-user behavior on the target Windows environment.
- Record code-page assumptions in files, databases and protocols.
Routine fixes should be built and tested against the established Delphi 7 output before a compiler upgrade is introduced.
Plan the next step
Continue maintenance when dependencies are controlled and change demand is bounded. A migration should explicitly test the ANSI-to-Unicode boundary, replacement components, BDE/data changes and Windows API declarations rather than combining them in one conversion.
See Delphi 7 migration, build recovery, modernization and the Delphi pillar.