how can i customize QMessageBox Icon;i am using this code

Qt Code: 
  1. QMessageBox mb("Application Name",
  2.                            "Hardware failure.\n\nDisk error detected\nDo you want to stop?",
  3. 						   QMessageBox::NoIcon,
  4.                            QMessageBox::Yes | QMessageBox::Default,
  5.                            QMessageBox::NoButton,
  6.                            QMessageBox::NoButton);
  7. 				QPixmap exportSuccess(":/new/prefix1/Resources/export.png");
  8.  
  9. 				mb.setIcon(QMessageBox::setIconPixmap(exportSuccess));
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but i get this error "illegal call of non-static member function"