21 int setenv(
const char *name, 
const char *value, 
int overwrite)
    26     if (GetEnvironmentVariable(name, &c, 
sizeof (c)) > 0) 
return 0;
    29   if (SetEnvironmentVariable(name, value) != 0) 
return 0;
 int setenv(const char *name, const char *value, int overwrite)