private void button2_Click(object sender, EventArgs e)
        {
            Metafile metafile;//定义图形-图元文件
            Picture.Picture x = new Picture.Picture();//利用matlab生成的类
            x.pictureTest01();//生成图象，并复制在剪切板上
            IDataObject iData = Clipboard.GetDataObject();//从剪切板获取数据
            if (iData.GetDataPresent(DataFormats.MetafilePict))
            {
                object o = iData.GetData(DataFormats.MetafilePict);
                metafile = (Metafile)o;
                this.pictureBox1.Image = metafile;
            }
        }