Here is a list of all related documentation pages:

Application lifetime
Audio clock and time
Bidirectional Text Editing
Binary Object Notation (BON8)
Building with gcc on Linux
Building with MSVC or clang on Windows
Building with Visual Studio
Building with Visual Studio Code
Building with Visual Studio Code devcontainer
Code Quality
Code Style
Dependencies
Hardware Support
How to draw
How To Log, Count and Trace
How to make widgets
How to use preferences
How to use widgets
Internationalization
Information reporting
ini_file
Application Preferences
Release Checklist
Render architecture
HikoGUI Rich Text
Signalling
Skeleton Template Language
Text
HikoGUI time handling