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I am getting this warning but all functions working properly .
what does this really means?
'strcpy': This function or variable may be unsafe.
Consider using strcpy_s instead. To disable deprecation,
use _CRT_SECURE_NO_WARNINGS. See online help for details.
This function (strcpy) is considered unsafe due to the fact that there is no bounds checking and can lead to buffer overflow. (Actually strcpy is infamous for overflow exploits and all programmers avoid it-or at least should avoid it). The advice is to use a safe function which takes into account the size of the destination buffer to avoid overflow. You could also use strncpy (BUT with caution!). There is no problem with your code, i.e. the functions will run as you say but try giving as input a buffer that is larger than the destination buffer. The function will overflow the destination buffer. Check this also link text