Tips
Roland Lannuzel

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 approach is peace of mind when the documents are opened again, safe in the knowledge that they have not been modified in the meantime.

This is especially important if you store 4D Write Pro documents as smart templates containing 4D code as external files on disk. Before executing this code you want to ensure the file was not externally modified.

Or, in the case of external documents, to be certain that they have come from the right sender and have not been altered during their digital journey.
The principle we’re about to describe applies to 4D Write Pro documents but applies to any other type of document with a few minor modifications.

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Tips
Add Komoncharoensiri

Tips & Tricks for your 4D Apps – December 2024 Edition

by Add Komoncharoensiri, Director of Technical Services at 4D Inc

Here we go with another set of tips and tricks.

The 4D Knowledge Base is a library of information about 4D technology where weekly tech tips and monthly tech notes are actively published. If you missed the last tips on the KB, that’s fine; here is a compilation from the past few weeks.

This blog post covers 15 tips:

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Tips
Add Komoncharoensiri

Tips & Tricks for your 4D Apps – September 2024 Edition

by Add Komoncharoensiri, Director of Technical Services at 4D Inc

Here we go with another set of tips and tricks.

The 4D Knowledge Base is a library of information about 4D technology where weekly tech tips and monthly tech notes are actively published. If you missed the last tips on the KB, that’s fine; here is a compilation from the past few weeks.

This blog post covers 20 tips:

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Tips
Avatar

How to Add Custom Components to your App

Qodly Studio for 4D is a powerful tool for creating full-featured, complex business applications. While its pre-built components are versatile, custom solutions are sometimes essential.

Custom components allow you to build a custom solution for your own project – and to benefit from many components built by 4D or the community to enrich your user interface.

This blog post, complemented by a video tutorial, will walk you through the process of integrating custom components into your Qodly Studio for the 4D project.

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