void CMyAppUi::HandleForegroundEventL(TBool aForeground)

{

 // Call Base class method

 CAknAppUi::HandleForegroundEventL(aForeground);

 if(aForeground)

 {

    // We have gained the focus

    ...

 }

 Else

 {

    // We have lost the focus

    ...

 }

}

void CMyAppUi::BringToForeground()

{

 // Construct en empty TApaTask object

 // giving it a reference to the Window Server session

 TApaTask task(iEikonEnv->WsSession( ));

               

 // Initialise the object with the window group id of

 // our application (so that it represent our app)

 task.SetWgId(CEikonEnv::Static()->RootWin().Identifier());

 

 // Request window server to bring our application

 // to foreground

 task.BringToForeground();

}

// Bring the application "theApp" to background

 TApaTaskList tasklist(iCoeEnv->WsSession());

 TApaTask    task(tasklist.FindApp(_L("theApp")));

 task.SendToBackground();  // or BringToForeground()