Framework behavior
Events, focus, keyboard handling, scaling, styles, modal behavior, and control lifecycles can differ between VCL and FMX.
A buyer's guide for Delphi developers
Before you pay for a VCL-to-FMX promise.
A converter can remove a great deal of repetitive work. It cannot press one button and turn every Windows-specific VCL application into a finished, tested, cross-platform FireMonkey product.
The essential fact
There is no honest one-click conversion from VCL to FireMonkey.
Embarcadero's own migration guidance explains that there is no direct migration path between the frameworks. VCL and FMX differ in component hierarchies, properties, drawing, layout, platform services, Windows messages, data controls, and third-party support.
Reference: Embarcadero, Migrating VCL Applications to FireMonkey.
Look beyond the form
Form conversion is not application conversion.
Replacing visible controls and renaming properties may save time, but it does not prove that the application's behavior, dependencies, or platform assumptions survived the move.
Windows-specific code
Messages, handles, GDI drawing, Winapi calls, shell integration, and owner-draw behavior may require redesign rather than substitution.
Data and dependencies
Database controls, LiveBindings, reports, grids, actions, resources, include files, and third-party libraries need separate analysis.
Proof of completion
A form that opens in the designer is not a finished application. Generated output still needs to compile, run, and pass real testing.
Verify before you buy
Ten questions every converter should answer.
Do not rely on screenshots, old announcements, broad percentages, or the word “automatic.” Ask for current, project-specific evidence.
- Current compatibilityWhich Delphi releases are supported and actually tested today?
- Dated maintenanceAre current release notes and a recent change history publicly available?
- Your-project trialCan you evaluate the converter against your own forms, source, and dependencies before paying?
- Reliable licensingWill the product continue to run if a registration or activation server becomes unavailable?
- Reachable supportIs there an active, published support channel with evidence of recent responses?
- Source analysisDoes it analyze Pascal code as well as DFM forms and component names?
- Risk detectionDoes it find Windows messages, Winapi dependencies, custom drawing, and unsafe framework assumptions?
- Third-party coverageCan it explain how your actual commercial and open-source components will be handled?
- Honest reportingDoes it report what was converted, omitted, approximated, or left for manual review?
- Compile evidenceIs there proof that eligible generated projects are compiled during validation?
If these questions cannot be answered clearly, do not spend money on the promise.
Maintenance matters
An old download is not an active product.
Internet searches still return conversion programs, archived announcements, personal utilities, and experiments created during the earliest years of FireMonkey. Some may have been useful at the time.
However, an available webpage or executable is not evidence of current maintenance, working licensing, modern Delphi compatibility, or dependable support.
A better standard
What responsible conversion looks like.
A trustworthy migration tool makes difficult cases visible. It helps the developer make informed decisions instead of manufacturing confidence.
Preserves the original VCL project.
Writes converted files to a separate output location.
Explains important conversion decisions.
Identifies unsupported and uncertain behavior.
Separates safe automation from manual-review cases.
Validates forms, properties, events, uses clauses, and source.
Supports transparent, extensible third-party mappings.
Produces a useful and reproducible conversion report.
Uses repeatable tests to guard known conversion behavior.
Never claims that programmer review is unnecessary.
Our position
VCL2FMXConverter makes no one-click promise.
VCL2FMXConverter is a migration assistant, not a magic compiler. It performs repetitive work that can be handled responsibly and reports risks or unsupported behavior instead of silently concealing them.
Its mapping packs can be inspected and extended. Its source is available under the Apache License 2.0. There is no purchase price, proprietary activation server, or hidden conversion engine standing between you and your project.
The standard is simple