QwtDial not exits

Hi all!
I have just installed Qwt 5.0.2,and want to learn the examples.The examples can run,but when I use QwtDial and QwtDialNeedle to write program,it says they are not exit.I think Qt4 haven't recognized Qwt,am I right?How can I deal?
Thank you very much!

You must add Qwt to INCLUDEPATH and LIBS just like any other library. More or less something like:

Quote:

---

INCLUDEPATH += /path/to/qwt-5.0.2/include
LIBS += -L/path/to/qwt-5.0.2/lib -lqwt5

---