无边框窗体移动的两种方式对比

很早的没有发布,建议使用第二种方式,第一种MouseMove 在移动的过程中一直要不停地改变坐标,应该是更小消耗性能?;

第一种方式:

Point mouseOff;//鼠标移动位置变量
        bool leftFlag;//标记是否为左键
        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                mouseOff = new Point(-e.X, -e.Y); //得到变量的值
                leftFlag = true;                  //点击左键按下时标注为true;
            }
        }

        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            if (leftFlag)
            {
                Point mouseSet = Control.MousePosition;
                mouseSet.Offset(mouseOff.X, mouseOff.Y);  //设置移动后的位置
                Location = mouseSet;
            }
        }

        private void Form1_MouseUp(object sender, MouseEventArgs e)
        {
            if (leftFlag)
            {
                leftFlag = false;//释放鼠标后标注为false;
            }
        }

第二种方式:

      　[DllImport("user32.dll")]
        public static extern bool ReleaseCapture();
        [DllImport("user32.dll")]
        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);  
        // 窗体上鼠标按下时

        private void panelEx1_MouseDown(object sender, MouseEventArgs e)
        {
            //常量  
            int WM_SYSCOMMAND = 0x0112;

            //窗体移动  
            int SC_MOVE = 0xF010;
            int HTCAPTION = 0x0002;

            ReleaseCapture();
            SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);  
        }