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HWND appwnd;appwnd = (HWND)w.winId();QString ClassName("Qt5QWindowIcon");QString AppName = QStringLiteral("GG");LPCWSTR app = reinterpret_cast
   
    (ClassName.data());LPCWSTR appCaption = reinterpret_cast
    
     (AppName.data());appwnd = ::FindWindow(app, appCaption);appwnd = ::FindWindow(app, appCaption);
    
   

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