Some little information about the status:

Those things are done:
- easy ability to change the optionbutton and checkbox image
- add a function for returning the selected line number as well as the string.
- change your variable types from var to int

This things are new:
Containers
Something like a panel
Windows
A container with caption, is moveable like a normal window

Those things are changed:
The background of the Elemtents is no more transparent.