/*判断在指定方向上是否有连续5个行棋方的棋子*/
int  JudgeWinLine(int Order,struct point Cursor,int direction)
{
   int i;
   struct point pos,dpos;
   const int testnum = 5;
   int count;

   switch(direction)
   {
   case 0:/*在水平方向*/
     pos.x=Cursor.x-(testnum-1);
     pos.y=Cursor.y;
     dpos.x=1;
     dpos.y=0;
     break;
中pos和dpos定义的是什么？