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
List Box
Listbox: “Blank if null” for TIME Columns and Footers!
For many versions, the "Blank if null" property has been available for "time" type zones, whether for input or display. However, it was not previously...
October 30, 2024
1 min read
Automatic Row Heights in Collection Based List Boxes
List boxes are the most versatile and customizable form objects. Automatic row heights were already possible for array-based list boxes. With the arri...
January 15, 2023
1 min read
LIST BOXES – Say Goodbye to Alt Key!
The drag and drop action is a standard action in computer interfaces. In the case of list boxes, pressing the "Alt" key is necessary to move several i...
October 18, 2022
1 min read
LIST BOXES: More Control. More Beauty!
List boxes are powerful and very customizable form objects. And their power is extended with 4D v19 R6 thanks to two new properties: horizontal and ve...
July 14, 2022
1 min read
List Boxes: Time Columns and Footer Calculation!
List boxes are great, powerful tools to display data in the interface. They can display fields from records, items from arrays, and since recently, en...
April 23, 2021
1 min read
List boxes: Manage clicks in edited cells
As a developer, you're used to handling events inside form objects. The most common is the on clicked form event which can be used in most objects, in...
January 22, 2021
1 min read
Type ahead made easy
If you're interested in the user interface, you may have already used the On before keystroke and On after keystroke events. You'll certainly be happy...
October 27, 2020
1 min read
List boxes: Setup movable rows (or not!) by code
List boxes are powerful form objects. They're easily created and manipulated, and most importantly, they can handle any kind of data. Additionally, th...
August 12, 2020
1 min read
ORDA – Better list box row selecting
You've probably used the LISTBOX SELECT ROW command many times, looping through each entity in order to select the rows for an entity selection. 4D v...
May 11, 2020
1 min read