So Lootekukur bandhu, it's just a general idea i wanted to put forth. don't be too technical in sajha yar. Great, I like your way of writing general idea. May be you can claim that even a general people can understand your #include,Void,int.. I apologize,I did not know that and did not realize that your comment was not based on any programming language just a simple english.. And in a serious note : Your presentation were good as usual.