How to install and use QWT to draw 2-d graphs?

[kiero88]

I've got the same problem, but I'm surprised, that it's no answer here.. It must be easy for experienced users here

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Added after 5 minutes:

Anyway, I'm going to write why I cannot solve this problem. I tried to follow instructions and I opened Qt command prompt, wrote qmake qwt.pro
It was right, without any problems, but when I had written instruction "make" it appeared error: make' is not recognized as an internal or external command, operable program or batch file.

I have installed MINGW. It still doesn't work.