Zip/unzip files and folders with these commands
Before exchanging files (by email for example), we often compress them to reduce their size before transmitting them. With 4D v18, you can compress an...
November 21, 2019
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.
New 4D View Pro form events
As of 4D v18, a new set of 4D View Pro form events are available. They return special information that can be accessed with the new FORM Event command...
November 19, 2019
1 min read
Expanding the abilities of the Form event command
As you may already know, the Form event command identifies the type of form event that has just occurred. It's typically used within a form or object ...
November 15, 2019
1 min read
C_VARIANT to store different type of values
Sometimes you want to write code being able to work with different variable types, this is especially true for generic coding. Using pointers can make...
November 14, 2019
1 min read
Power of objects and dot notation
With 4D v17 R5, we showed you how easy it is to manipulate an object to retrieve the attributes of a file or folder. Things have gotten even easier th...
September 3, 2019
1 min read
Retrieve the current execution call chain
When programming an application, you may need to know where you are in your code, especially when one method calls other methods, which may then call ...
July 23, 2019
1 min read
Who’s who? A new way to identify users
As a 4D developer you often need to manage end users with your own directory system. For internal users, you might create a few profiles with differen...
May 15, 2019
1 min read
Object notation to handle files and folders
4D already provides commands to handle files and folders, but what about new commands that take advantage of the power of object notation? Objects ha...
May 2, 2019
1 min read
Read 4D object fields with SQL Engine
A 4D object field is a persistent database field type, stored as binary content. Previously, reading this type of field by an ODBC driver wasn't possi...
April 19, 2019
1 min read
Formula: More power behind simplicity
The Formula command is available since 4D v17 R3. So far you might have thought of assigning a formula as a method to an object or building smart obje...
March 26, 2019
1 min read