It seems that QtQuick controls are not being rendered in an MFC application. The attached Visual Studio solution uses QtWinMigrate project to integrate Qt and MFC controls.

When instantiating a QtQuick control using QtQuickWidget (a simple red Rectangle) and trying to add it to the layout of whose parent is a QWinWidget a white area is being displayed instead.

As part of the test application, I have used two native QWidget controls inside the layout where the QtQuickWidget was added : QLabel and QLineEdit and those are being rendered fine.

See also README.txt file from the attached package.