QFileDialog::getOpenFileNames returns filenames with slash, not backslash in Windows XP

In Windows XP calling of QFileDialog::getOpenFileNames returns filenames with slash, not backslash as awaited.
for example we see in DbgView
"C:/Documents and Settings/qq/Local Settings/Application Data/Google/Chrome/Application/chrome.exe"

In Windows 7 it returns filenames with backslash as awaited.
for example we see in DbgView
"C:\Documents and Settings\qq\Local Settings\Application Data\Google\Chrome\Application\chrome.exe"

...
QString curdir;
QDir::setCurrent(curdir);
QStringList fileNames = QFileDialog::getOpenFileNames(this, tr("Select files"),
    curdir,
    tr("Any file (*.*)"));

if (fileNames.count()<=0)
    return;

QStringList lstNotAddFiles;

for(int i=0;i<fileNames.count();++i) {
    QString	fileName = fileNames.at(i);		

    qDebug() << fileName;
}
...