Shamoon wrote: Here is the problem, if a user of my application manually open and edit the file and disturb its syntax, then ofcourse program will not work. So, i do not want to distribute a plain text file to user. Instead i want to provide user a dll, in which this data must be present. In my ipnion,I think the easiest solution is to rename your ***.txt as ***.dll.I mean,user may think the file is a dll file,but it is a text file actually. Shamoon wrote: As such is it possible for me to append dll data as what i am doing in case of text file?? If yes, than how do i make such dll and how i represent data in that dll whether char array or what??? Is there any other alternative solution you suggest for my problem ???? My answer is that you can program to change the True Dll file resource to complete your thoughts. But I strongly suggest you to use my solution,I had use it in many many many project.It's my top secret :(;) I am I,Who is who,I am who,Who am I