New Class to Perform UDP Communications
4D 20 R8 introduced the TCPConnection class, bringing an object-oriented, asynchronous way to handle TCP client connections. Then came 4D 20 R9 with t...
July 17, 2025
1 min read
4D Language
Design application logic with strong typing, object oriented principles, structured error handling, and modular class architecture. Write clear, maintainable code that works consistently across desktop, web, REST, and client server environments.
Stricter class-based typing for objects
With 4D 20 R10, object typing takes a major step forward, giving you more confidence and control in your code. Instead of simply checking if a value i...
July 16, 2025
1 min read
Building Forms on the fly with New Data Source Commands
In application development, it is often necessary to build forms dynamically. For example, you might want to generate a search form on the fly, tailor...
July 15, 2025
1 min read
Generate, share and use web sessions One-Time Passcodes (OTP)
Today, web applications have become integral to our lives, offering convenient features that save time and simplify everyday tasks. As an example, cre...
June 16, 2025
1 min read
New class to handle incoming TCP connections
In 4D 20 R8, we introduced the TCPConnection class, allowing you to initiate TCP connections to remote servers. With 4D v20 R9, we're excited to bring...
May 16, 2025
1 min read
Use class in embedded web area with $4d
With 4D 20 R9, 4D introduces new commands that allow developers to define an object context for $4d, ensuring only specific functions are exposed. Pre...
April 24, 2025
1 min read
Warnings on Deprecated Language Elements
With the release of 4D 20 R9, deprecated language elements now generate warnings, helping you keep your code as modern and efficient as possible. Let'...
April 23, 2025
1 min read
New class to perform TCP connections
With the release of 4D 20 R8, a game-changing feature has arrived:: the TCPConnection class. This modern class leverages object-oriented syntax and su...
January 29, 2025
1 min read
4D Write Pro – Sign and secure documents
The purpose of this article is to show how, in an easy-to-implement way, you can sign and verify documents transparently. The obvious benefit of this...
January 28, 2025
1 min read
Debugging 4D Code Directly in Visual Studio Code
For Visual Studio Code users working with 4D, a new extension called 4D-Debugger that works with 4D 20 R8 is now available. The new 4D-Debugger exten...
January 23, 2025
1 min read