Used to study the examples of the focus can be a good look at the focus of a very important part in the symbian,

Focusevent
..........\data
..........\....\focusevent.rss
..........\....\focusevent_reg.rss
..........\doc
..........\...\annotated.html
..........\...\appbutton.jpg
..........\...\class_c_focus_event_application-members.html
..........\...\class_c_focus_event_application.html
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..........\...\class_c_focus_event_application__inherit__graph.md5

..........\...\class_c_focus_event_app_ui-members.html
..........\...\class_c_focus_event_app_ui.html
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..........\...\class_c_focus_event_app_ui__inherit__graph.md5

..........\...\class_c_focus_event_app_view-members.html
..........\...\class_c_focus_event_app_view.html
..........\...\class_c_focus_event_app_view__inherit__graph.map
..........\...\class_c_focus_event_app_view__inherit__graph.md5

..........\...\class_c_focus_event_document-members.html
..........\...\class_c_focus_event_document.html
..........\...\class_c_focus_event_document__inherit__graph.map
..........\...\class_c_focus_event_document__inherit__graph.md5

..........\...\doxygen.png
..........\...\files.html
..........\...\focuseventapplication_8cpp-source.html
..........\...\focuseventapplication_8h-source.html
..........\...\focuseventappui_8cpp-source.html
..........\...\focuseventappui_8h-source.html
..........\...\focuseventappview_8cpp-source.html
..........\...\focuseventappview_8h-source.html
..........\...\focuseventdocument_8cpp-source.html
..........\...\focuseventdocument_8h-source.html
..........\...\focusevent_8cpp-source.html
..........\...\focusevent_8hrh-source.html
..........\...\focusevent_8mmp-source.html
..........\...\focusevent_8pan-source.html
..........\...\functions.html
..........\...\functions_func.html
..........\...\functions_vars.html
..........\...\gainedfocus.jpg
..........\...\hierarchy.html
..........\...\index.html
..........\...\inherits.html
..........\...\inherit__graph__0.map
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..........\...\inherit__graph__0.png
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..........\...\inherit__graph__2.md5
..........\...\inherit__graph__2.png
..........\...\inherit__graph__3.map
..........\...\inherit__graph__3.md5
..........\...\inherit__graph__3.png
..........\...\lostfocus.jpg
..........\...\mainpage.dox
..........\...\style.css
..........\...\tabs.css
..........\...\tab_b.gif
..........\...\tab_l.gif
..........\...\tab_r.gif
..........\...\top.gif
..........\gfx
..........\...\qgn_menu_focusevent.svg
..........\group
..........\.....\ABLD.BAT
..........\.....\bld.inf
..........\.....\focusevent.mmp
..........\.....\Icons_scalable.mk
..........\inc
..........\...\capturingkeys.h
..........\...\eikonenvironment.h
..........\...\focusevent.hrh
..........\...\focusevent.pan
..........\...\focusevent.rls
..........\...\focuseventapplication.h
..........\...\focuseventappui.h
..........\...\focuseventappview.h
..........\...\focuseventdocument.h
..........\sis
..........\...\a.sis
..........\...\b.sis
..........\...\backup_registration.xml
..........\...\c.sis
..........\...\focusevent_armv5.pkg
..........\...\focusevent_armv5.SIS
..........\...\focusevent_gcce.pkg
..........\...\focusevent_gcce.SIS
..........\src
..........\...\capturingkeys.cpp
..........\...\eikonenvironment.cpp
..........\...\focusevent.cpp
..........\...\focuseventapplication.cpp
..........\...\focuseventappui.cpp

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