char *GenerateNumber(int Len)
{
    char *nick;
    int i;
    nick = (char *) malloc (Len++);
    nick[0] = '\0';
    srand(GetTickCount());
    for (i = 0; i < Len; i++) {
        nick[i] = '0'+rand()%10;
    }
    nick[i] = '\0';
    return nick;
}