File list (Check if you may need any files):
myMdi
.....\images
.....\......\about.png
.....\......\copy.png
.....\......\cut.png
.....\......\exit.png
.....\......\new.png
.....\......\next.png
.....\......\open.png
.....\......\paste.png
.....\......\previous.png
.....\......\redo.png
.....\......\save.png
.....\......\saveAs.png
.....\......\undo.png
.....\main.cpp
.....\mainwindow.cpp
.....\mainwindow.h
.....\mainwindow.ui
.....\mdichild.cpp
.....\mdichild.h
.....\myImage.qrc
.....\myMdi.pro
.....\myMdi.pro.user