Installed using Qt installation. Thanks.
Added after 7 minutes:
I searched for QAapplication file on my Windows computer C drive and found following path for the QApplication include file:
C:\Qt\5.9\mingw53_32\include\QtWidgets
I am trying to add this folder path to the include path in Qt.
How to add (menu, sub-menu selections?) this QtWidgets include path please?




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