Hello. First of all, my english isn't well, I apologize for it. In C:\Program Files\CodeBlocks\MinGW\include folder, there is a file named "string.h". And it includes all names of string functions, for example; strcmp,strcpy,strlen... I want to know how i can access the original codes of these functions. For example I want to access codes of strcmp function. I couldn't find in codeblocks folder this, but codeblocks folder must include codes of these functions. Also there are files extension .a, and i think it can includes these codes, but i couldn't open these files. If you help me, i will be reall happy. Hava a good day.