The Qt VS Tools for Visual Studio 2015 allow developers to use the standard development environment without having to worry about any Qt-related build steps or tools.
Qt Visual Studio Tools integrate the Qt development tools into Microsoft Visual Studio
2015. This enables developers to use the standard Windows development environment
without having to worry about Qt-related build steps or tools.
The Qt Company ended official support of this extension in August 2021 and has no plans to resume maintenance of it in the future.