What Environmental Variables PATH I need to add for Qt5 to recognize include ?

Question

Editorial Team

Asked: June 18, 20262026-06-18T06:29:10+00:00 2026-06-18T06:29:10+00:00

I used VS2012 command prompt to build Qt5Sdk and it’s work, but it’s not recognize

include QtGui/QApplication,

include QFileDialog

and more…it’s does recognize

include QGui

.

maybe VS2012 build didn’t goes well?

BTW in Windows7 where’s are the INCLUDE, LIB and LIBPATH, becaise I can see I can set them from Qt, but when entered windows 7 environment variables there is only PATH?

Thanks!

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Editorial Team · Answer 1 · 2026-06-18T06:29:11+00:00

Editorial Team

In Qt5, QApplication class was moved from QtGui modul to QtWidgets.

So, instead of

#include <QtWidgets/QApplication>

put

#include <QtGui/QApplication>

and instead of

QT += core gui

you should have

QT += core gui widgets

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