How use unicode in Arabic language?

Hi,
I am using clucene library to index and search my text .I am using Arabic text only.
when i retrieve the text from the highlighter i gets it in a wchar_t* pointer.

So, I am using QString::fromWCharArray(wchar_t*) but the text does not appear in Arabic,it appears in strange characters.
I also tried

Code:

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QString::fromUtf16()
QString::utf8()
QString::data()

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can any body help me to display it in right character codec?
Thank you

Not sure but for a Japanese project my main.cpp looks like this.

Code:

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int main( int argc, char* argv[] )
{
        QApplication app( argc, argv );
        QTextCodec::setCodecForTr( QTextCodec::codecForName( "UTF-8" ) );
        QTextCodec::setCodecForCStrings( QTextCodec::codecForName( "UTF-8" ) );
        auction* my_auction = new auction();
        my_auction->show();
        return app.exec();
}
 
I seem to recall it not display the characters at all (even though they were simply hard-coded into the source) w/o those two lines... or at least one.

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