Qt如何向系统发送键盘和鼠标事件？

向系统发送键盘事件：
void QWSServer::sendKeyEvent ( int unicode, int keycode, Qt::KeyboardModifiers modifiers, bool isPress, bool autoRepeat ) [static]
向系统发送鼠标事件：
QMouseEvent *mEvnPress;
  QMouseEvent *mEvnRelease;
  mEvnPress = new QMouseEvent(QEvent::MouseButtonPress, pos, Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
  QApplication::sendEvent(QWidget::focusWidget(),mEvnPress);
  mEvnRelease = new QMouseEvent(QEvent::MouseButtonRelease, pos, Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);

  QApplication::sendEvent(QWidget::focusWidget(),mEvnRelease);

http://topic.csdn.net/u/20110225/01/c1e12154-449e-4ca5-996f-50b5e13ba11a.html