自己写的，类似MSN,QQ的提示窗体

效果图：

这是关键性的代码，把他们放入到一个ArrayList（）中，msgid是定义的一个ArrayList，

判断关闭时，在arraylist中把id移除掉，这样就可以实现循环窗体

id = 0;

Boolean flag = false; //id是否已存在

while (true)

{

for (int j = 0; j < msgid.Count; j++)

{

if (id == Convert.ToInt32(msgid[j]))

{

id++;

flag = true;

break;

}

flag = false;

}

if (flag == false)

{

msgid.Add(id);

break;

}

int rowCount; //从右下角开始

rowCount = Convert.ToInt32(Screen.PrimaryScreen.WorkingArea.Height / (Size.Height + 5));

point.X = Screen.PrimaryScreen.WorkingArea.Width - (Size.Width + 10) * (Convert.ToInt32(id / rowCount) + 1);

point.Y = Screen.PrimaryScreen.WorkingArea.Height - (Size.Height + 5) * (id % rowCount + 1);

Location = point;

rect.Size = Size; //区域大小等于窗体大小

Opacity = 0.0;

Msg.Text = id.ToString() + " (" + point.X.ToString() + "," + point.Y.ToString() + ")";

delay = time / timer.Interval;

timer.Start();