enabled Web3Gl

elicat

hello,
I have to use a graphics library in my project with QML / QWebEngine.
I set and tested the WebGL enablement.
Usage VS2017 / Windows is QT 5.11
I have performed the following steps
In the QML file

import QtWebEngine 1.6
        WebEngineView {
            id: viewEnginePgm
            settings.webGLEnabled: true

At the opening of the application

QCoreApplication :: setAttribute (Qt :: AA_UseDesktopOpenGL);
QCoreApplication :: setAttribute (Qt :: AA_UseSoftwareOpenGL);

In the .pro file

LIBS + = opengl32.lib

The result is always the same.
Does anyone have an idea to solve it?
Thanks