Hi Ashok, > now i want to hide this string. how can i do this? Back in the day (when I used Manx C, Comeau C++, Lattice C++, and SAS/C++) I've done that by taking my strings, and use an encryption on them. Decrypt them in memory at run time either on an as-needed basis, or en masse. I do not believe that GCC provides a built-in facility for doing that. HTH, --Eljay