MOUSEEVENTF_ABSOLUTE Specifies that the dx and dy parameters contain normalized absolute coordinates. If not set, those parameters contain relative data: the change in position since the last reported position. This flag can be set, or not set, regardless of what kind of mouse or mouse-like dev...
65559是VB中规定的鼠标坐标的范围.而1027*768是指我们电脑实际的大小`这样的一个比例`就把原来VB对应的坐标`转换成了我们电脑屏幕中的坐标.