Unicode strings int Qt 4.2.1

[JonathanForQT4]

working like a charm, many thanks!

[thaihoangluu]

I use Eclipse IDE for C/C++ & QT integration plug-in , but I'm not write Unicode ?
How to resolve ? Thank every body.
Example: I write : "Chà o tất cả các bạn!" but It show in program: "Chà o t?t c? các b?n"