求一个思路
页面
picturebox1 picturebox2 picturebox3
-----------------picturebox4--------------
picturebox4的长度是与上面三个picturebox的长度对应的，上面有几个picturebox还不确定，
如果只显示picturebox2和picturebox3，那么picturebox4怎么截取对应的长度
如下
picturebox2 picturebox3
---------picturebox4-------
应该怎么实现picturebox4左边的截取（右端截取我能实现，比如只出现picturebox1的情况），我想遍历出所有picturebox的location.x，但是遍历出来最小的是picturebox4的，我怎么才能得到picturebox2的location.x呢（我说的情况是假如，起始picturebox2出现不出现不一定）就是说我左端截取不会实现，请指教

[解决办法]
简单啊 就是说上面 123 是可有可无 可能都出现可能都不出现 而4的位置永远是 上面显示的图片最左一个的location.x
宽度永远是上面最左边一个图的location.x家最右一个图的location.x+最右一个图的width如果是这个意思我写个代码给你看
[解决办法]

C# code

if (picturebox1.Visible = true) 
       { 
         if (picturebox2.Visible = false) 
         {  
         } 
         else if (picturebox3.Visible = false) 
         { 
           picturebox4.Width = (this.Width - picturebox1.Location.x) - (this.Width - picturebox2.Location.X - picturebox1.Width); 
           picturebox4.Location = new Point(picturebox1.Location.X, picturebox1.Location.Y + picturebox1.Height); 
         } 
         else 
         { 
           picturebox4.Width = (this.Width - picturebox1.Location.x) - (this.Width - picturebox3.Location.X - picturebox1.Width ); 
           picturebox4.Location = new Point(picturebox1.Location.X, picturebox1.Location.Y + picturebox1.Height); 
         } 
       } 
       else if (picturebox2.Visible = true) 
       { 
         if (picturebox2.Visible = false) 
         { 
         } 
         else if (picturebox3.Visible = false) 
         { 
           picturebox4.Width = (this.Width - picturebox2.Location.x) - (this.Width - picturebox2.Location.X - picturebox2.Width); 
           picturebox4.Location = new Point(picturebox2.Location.X, picturebox2.Location.Y + picturebox2.Height); 
         } 
         else 
         { 
           picturebox4.Width = (this.Width - picturebox2.Location.x) - (this.Width - picturebox3.Location.X - picturebox2.Width); 
           picturebox4.Location = new Point(picturebox2.Location.X, picturebox2.Location.Y + picturebox2.Height); 
         } 
       } 
       else if (picturebox3.Visible = true) 
       { 
         picturebox4.Width = (this.Width - picturebox3.Location.x) - (this.Width - picturebox3.Location.X - picturebox3.Width); 
         picturebox4.Location = new Point(picturebox3.Location.X, picturebox3.Location.Y + picturebox3.Height); 
       } 
       else 
       { 
         MessageBox.Show("3个图片都没有显示"); 
       }