Zbar under qt creator IDE qt 5.4.1

[Dawid]

Hello
Is it possible to to use zbar library for scanning codes under qt creator and qt 5.4.1? I have added library to project but when I writes something like:
zbar::Image img();
Program instantly crushes without any errors. Have I done something wrong or it is just not possible to use zbar with qt? If so can you recomend other library for scanning codes in qt? Thanks.

[Dawid]

Ijust have to include dll's to project.