winform窗体的样式很单一，不够漂亮，往往我们需要对窗体进行重写，但是我们又要保留在重写前窗体本身带的功能，例如拖动窗体的头进行移动之类的。
一下方式可以实现该方法：
[DllImport("user32")]public static extern int ReleaseCapture();[DllImport("user32")]public static extern int SendMessage(IntPtr hwnd, int msg, int wp, int lp);/// <summary>/// 是否允许移动/// </summary>bool IsMove = false;/// <summary>/// 判断鼠标是否在可移动范围内按下/// </summary>private void Form_MouseDown(object sender, MouseEventArgs e){if (e.Button == System.Windows.Forms.MouseButtons.Left){Rectangle rect = new Rectangle(1, 1, this.Width - 70, labMin.Height); //允许拖动的矩形范围this.IsMove = rect.Contains(new Point(e.X, e.Y)); //鼠标按下的点是否在允许拖动范围内 }}/// <summary>/// 鼠标弹起时取消移动/// </summary>private void Form_MouseUp(object sender, MouseEventArgs e){this.IsMove = false;}/// <summary>/// 移动窗体/// </summary>private void Form_MouseMove(object sender, MouseEventArgs e){if (this.IsMove && e.Button == System.Windows.Forms.MouseButtons.Left && this.WindowState != FormWindowState.Maximized){ReleaseCapture();SendMessage(Handle, 274, 61440 + 9, 0);return;}}
