QT advanced settings

I need to open Ms Word, excel, Internet Explorer,skype,specific folder,keyboard and calculator in a QT application. The files need to show in a widget. Is there a plugin available which can allow the files to be opened?Can you suggest any method to solve this. Thanks in advance...

I guess you're looking for http://qt-project.org/doc/qt-5.0/qtcore/qprocess.html

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Added after 4 minutes:

And QFileDialog for selecting files...

Thank you. It works.