No such file or directory

[gemy]

i had this error Phonon:No such file or directory when i type : #include <Phonon>
why?...........

and there are alot of classes makes the same problem.

[tbscope]

The error is very obvious. You do not have the file Phonon on your computer, or it can not be found.

How did you install Qt?

[Sven]

Did you add QT += phonon to your project file?

[gemy]

thank you . i did it after adding QT: phonon in .pro file but i had the same problem in QMessageServiceAction