Conerting monitor's normal screen into touch screenI jusy came across the topic in formu discussion at URL : http://www.techulator.com/forum/350-How-make-personal-computer-into-Touch-Screen-mode.aspx
I then googled the matter and came up with answers the finds and one or 2 web sites are as under
(i) Search result - Google
(ii)Commercial way to DIY (do it yourself)at some cost.
(iii) By attaching some devices etc - this is what the member who posted at url in the beginning was needing I think.