Core headers not found

[NullPointer]

You don't need to use "QtGui\"...

Just review your .pro file, and make sure you have a line like:

QT += core gui

QT += core gui

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And you should not have a "QT -= core"...

HTH

[CDRW]

Still isn't working

That's the first line inside of it.


EDIT: Update: I've found that it actually works just fine in Code::Blocks. I am not entirely sure why.