how to browse images in qt ??

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Hello
how to browse images in qt ??
I used this program
http://doc.qt.nokia.com/4.7-snapshot...indow-cpp.html

QString directory = QFileDialog::getExistingDirectory(this,
                                tr("Find Files"), QDir::currentPath());

QString directory = QFileDialog::getExistingDirectory(this,
                                tr("Find Files"), QDir::currentPath());

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But, does not display the image
I do not know why