String & String

I can’t add a string into another string.

char sysdir[255];char ss[255];
LPWIN32_FIND_DATA fd;
HANDLE hd;
sprintf((char*)ss, “%s\\msvbvm60.dll\0”, sysdir);
GetSystemDirectoryA(sysdir, 255);
hd = FindFirstFileA(ss, fd);

What’s wrong? Thank you!