init empty project for lab2
reuse some code from lab1, add icon and cursor
test self-written resource files, add a menu
add 'about' dialog box
add listbox control
add a scrollbar that changes the window background color
normalize some spacing
implement a dirty solution of external config file
setup 2 trackbars to control window width and height
handle in the same way all messages from both trackbars
add standard scrollbars
fix scrolling on resize
customize listbox
handle delete key for listbox (through subclassing)
handle Ctrl-S for saving window state
handle the rest of scrollbar messages
finish scrollbar functionality, add statics, change font