呵呵，小弟初学破解，这是一天的劳动成果，程序呢写的不起眼，只是放上来交流，请多赐教

TC 2.0 XP SP2下调试通过

#include <stdio.h>
void main()
{
   long n=0,x=0,y=0;
   int leng,t;
   int i=0;
   int m[]={11,6,17,12,12,14,5,12,16,10,11,6,14,14,4,11,6,14,14,4,11,9,12,11,10,8,10,10,16,3,4,6,10,12,16,8,10,4,16,0};
   char name[42];
   printf("Please input your name:");
   scanf("%s",name);
   while(name[i]!='\0') i++;
   leng=i;  /* the length of name */
   if(i<4)
     {
      printf("The length of of your name must >3");
      exit(0);
     }
   printf("\t  Your RegCode is  :");
   for(i=3;i<=leng;i++)
     n+=name[i]*m[i-3];
   printf("%ld-",n);
   for(t=2;t<leng-1;t++)
    {
     x=name[t]*name[t+1];
     x*=(long)m[t-2];
     y+=x;
    }
   printf("%ld\n",y);
}

注册成功后会在HKCU\Software\mIRC下保存：
"License"="Your RegCode"
"Username"="Your name"
重启较验