info = QTextCodec::codecForName("GB2312")->toUnicode (xxx);

xxx is "char *".
When My Code include this like QTextCodec::codecForName . My PC (winxp sp2) run it very well.

but When I copy the exe file to other PC(XP and Win7). The App always crash. del this line,that's OK.
when I using "QLatin1String or toLation",that's ok in all PC.
when I using the QSetting::setIniCodec (QTextCodec::codecForName ("UTF-8")),that's ok in all PC.