vc 如何判断2个矩形是否有交集

1)

typedef struct rec_{

long top;

long left;

 long bottom;

long right;

}rec;

BOOL RectOverlap(const rec*rA, const rec *rB){

 if (!(rA.bottom< rB.top || rA.top > rB.bottom)&& !(rA.right< rB.left || rA.left > rB.right))

 return TRUE;

return FALSE;

};