Download plug-ins

open vs

Expand -> Manage extensions -> Search for Qt VS Tools-> Install the first one

close

newly build

  Running results

  The code problem

The first solution

#include "qtwidgets.h"
#include <QtWidgets/QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QtWidgets w;
    w.setWindowTitle(u8" The first window ");//  To utf-8 code  
    w.show();
    return a.exec();
}

The second solution ：

Open compiled file , Notepad open -> Save as -> Change the encoding format to include bom Of utf-8 Format preservation

The third solution ：

Download plug-ins ; Download the third