i have to make a web services in which on client request i have to
gether a file name from data base n then same time i have to calll
windows services. In windows services i made code so that it will
call all the files from hard disk to memory.now from web services i
have to call that window services n then acc to that file name i have
to show that file to the client machine.

CALLING WINDOW SERVICE FROM WEB SERVICE
Sidd
I'm not sure what your question is here. Are you asking how do you create a web service To do that you just create a new ASP.NET Web Service web site in Visual Studio, define your web methods and off you go. Here is some related documentation:
http://msdn.microsoft.com/library/default.asp url=/library/en-us/cpguide/html/cpconbuildingaspnetwebservicesbasics.asp
I hope this helps.
Daniel Roth
venkas