I think reading the purpose of the tutorial would help, however I also linked a capx that will serve your purpose for linear sliding of a touch event. the linking of the tutorial was only for checking out how to do drag and drop object to effect another sprite. not to literally copy command for command :D
However, I thought of an easiest way to do only up and down sliding. I updated the capx.
here is the link to the capx samples directly relating to what you want
there are 3 models.
Left: uses ontouch background object
middle: drag and drop the slider box
right: drag and drop a drag box that effects the moving sprite.
choose one that serves you best :)