void PmFocusHandledLineEdit::focusInEvent( QFocusEvent * event )
{
 　if (event->reason()==Qt::MouseFocusReason)
　 {
 　　 QFocusEvent *fe=new QFocusEvent(QEvent::FocusIn, Qt::TabFocusReason);
 　　 QApplication::postEvent(this, fe);
　 }
 　else
　 {
 　　 QLineEdit::focusInEvent(event);
 　}
}

• Reimplementing QCoreApplication::notify. This is very powerful, providing complete control; but only one subclass can be active at a time.
• Installing an event filter on QCoreApplication::instance(). Such an event filter is able to process all events for all widgets, so it’s just as powerful as reimplementing notify(); furthermore, it’s possible to have more than one application-global event filter. Global event filters even see mouse events for disabled widgets.
• Reimplementing QObject::event() (as QWidget does). If you do this you get Tab key presses, and you get to see the events before any widget-specific event filters.
• Installing an event filter on the object. Such an event filter gets all the events except Tab and Shift-Tab key presses.
• Reimplementing paintEvent(), mousePressEvent() and so on. This is the commonest, easiest and least powerful way.

//2. run configure with win32-g++ // obselete, a good methods here

3. cvs_qtmsvc_bcc.zip should merge with qt4msvc_bcc.zip, then overwrote by files from mkspecs-from-evaluation-version

4. set qmakespec to win32-msvc.net
4.1 rename the License.cpl to license.TROLL
4.2 copy qmake-from-eval to qmake dir, rename to qmake.exe
4.2 open the makefile under the qmake dir, comments the all: xxx line, and then add a line "all: "
4.3 run configure, it will configure for you.

5. use qmake -recursive to generate makefiles (in general, this step
will be done during the configure process. but, if you run with any
other makespec rather than msvc.net, please do it again. In a clean installation, it’s ok to skip this step)

6. nmake all files, it will cost much time. but, you can stop it at any
time, and then simply run nmake again to continue the process.