Win7 : Error c1083: Cannot open include file: QApplication: no such file or directory

FrankyQt123

Hi , i have this problem on Windows:

Installed MSVs 2010 ultimate
Qt 5

When creating an Empty Qt Project, add new c++ source and just put #include <QApplication>
i get the error.

Qt Projects show:

INCLUDE=C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE;C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\ATLMFC\INCLUDE;c:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include;C:\Qt\Qt5.0.0\5.0.0\msvc2010\include
LIB=C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\LIB;C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\ATLMFC\LIB;c:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\lib;C:\Qt\Qt5.0.0\5.0.0\msvc2010\lib

any idea what is going wrong ?

sierdzio

In your .pro file:
@
QT += core gui widgets
@

And it should work. If not, then add this include:
@
#include <QtWidgets/QApplication>
@

FrankyQt123

Hi THX for the reply, but it didn't helped.

I'm new with Qt and folled Youtube http://www.youtube.com/watch?v=Gk3zh5lA4ww

Got it worked this way:

Instaed of create an Empty Qt Project; create a Qt Gui App
and delete the Form etc....now it works.

THX

steno

With an empty Qt Project, you could have right clicked on the solution and edited the qt project settings by adding the Qt Gui library that way.

Croydon

Also, you can simply right click on the project/solution name (in the TreeView) and click in "Run qmake", after doing it, rebuild or run the project.