WinFrom鼠标经过时图片按钮放大缩小

public   partial   class  Form2 : Form
{
    Size szStandard  =   new  Size();

     ///   <summary>
     ///  系统构造函数
     ///   </summary>
     public  Form2()
    {
        InitializeComponent();

         foreach  (Control ctrl  in   this .Controls)
        {
             if  (ctrl  is  PictureBox)
            {
                ctrl.MouseHover  +=   new  EventHandler(ctrl_MouseHover);
                ctrl.MouseLeave  +=   new  EventHandler(ctrl_MouseLeave);
            }
        }
    }
     ///   <summary>
     ///  鼠标移开图标缩小事件
     ///   </summary>
     ///   <param name="sender"></param>
     ///   <param name="e"></param>
     void  ctrl_MouseLeave( object  sender, EventArgs e)
    {
        PictureBox picbox  =  (PictureBox)sender; picbox.Size  =  szStandard;
    }
     ///   <summary>
     ///  鼠标移上图标放大事件
     ///   </summary>
     ///   <param name="sender"></param>
     ///   <param name="e"></param>
     void  ctrl_MouseHover( object  sender, EventArgs e)
    {
         // 每次放大图片原大小的20%
        PictureBox picbox  =  (PictureBox)sender; szStandard  =  picbox.Size; picbox.Size  =  Size.Ceiling( new  SizeF(picbox.Width  *   1.2f , picbox.Height  *   1.2f ));
    }
}