QT connecting external libraries

1. Generate external library files

2. hold dll Files in qt Project directory

3. engineering .pro File plus

INCLUDEPATH += ‘{ The root directory generated by the external library （ need .h file ）}’

LIBS += -L “{ Directory of external libraries }”
-l QGLViewer2 \ : { Library name }

If you report an error, you may want to add qt Built in Libraries in
for instance
QT += core gui (xml opengl)
LIBS += -lopengl32 -lglu32