public Form1()
        {
            InitializeComponent();
            GraphicsPath path = new GraphicsPath();
            //這裡繪畫影象
            path.AddLine(0, 0, 200, 0);
            path.AddLine(0, 0, 100, 174);
            path.AddLine(100, 174, 200, 0);
            Region re = new Region(path);
            //將視窗設定為影象的形狀
            this.Region = re;


            //透明的窗體邊框
            //this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            //this.BackColor = Color.Red;
            //this.TransparencyKey = this.BackColor;
        }
 

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