The mentioned test programm

filedialog.cpp (text/plain), 151 bytes, created by Jochen Riehm on 2007-10-09 17:31:53 UTC

#include <QtGui/QtGui>

int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
    QFileDialog fd(NULL, "", "");
    return fd.exec();
}