error: QT 5.0 QTreeWidget include not found

Question

In manual for QTreeWidget it states that we have to:

include

however when I do that I get error:

d:*********: error: C1083: Cannot open include file: 'QTreeWidget': No such file or directory

However #include gets found.

Where does it go wrong here? Thanks!

Answer 1

Add QT += widgets (to link with the widgets module) into your .pro file, then run qmake and then build your project.