C# 重写鼠标移动窗体事件

C# 重写鼠标移动窗体事件

using System.Runtime.InteropServices;

 

        [DllImport("user32.dll")]

        public static extern bool ReleaseCapture();

        [DllImport("user32.dll")]

        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

        public const int WM_SYSCOMMAND = 0x0112;

        public const int SC_MOVE = 0xF010;

 

        public const int HTCAPTION = 0x0002;

 

         <summary>

         重写WndProc方法,实现窗体移动和禁止双击最大化

         </summary>

         <param name="m">Windows 消息</param>

        protected override void WndProc(ref Message m)

        {

            switch (m.Msg)

            {

                case 0x4e:

                case 0xd:

                case 0xe:

                case 0x14:

                    base.WndProc(ref m);

                    break;

                case 0x84://鼠标点任意位置后可以拖动窗体

                    this.DefWndProc(ref m);

                    if (m.Result.ToInt32() == 0x01)

                    {

                        m.Result = new IntPtr(0x02);

                    }

                    break;

                case 0xA3://禁止双击最大化

                    break;

                default:

                    base.WndProc(ref m);

                    break;

            }

        }

 

        private void ribbonControl1_MouseDown(object sender, MouseEventArgs e)

        {

            ReleaseCapture();

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

        }

 

        private void MainForm_Resize(object sender, EventArgs e)

        {

            Region region = null;

            switch (this.WindowState)

            {

                case FormWindowState.Maximized:

                    region = new Region(this.ClientRectangle);

                    break;

                case FormWindowState.Normal:

                    using (GraphicsPath path = new GraphicsPath())

                    {

                        int r = 16;

                        path.AddArc(0, 0, r, r, 180, 90);

                        path.AddArc(this.Width - r - 1, 0, r, r, 270, 90);

                        path.AddArc(this.Width - r - 1, this.Height - r - 1, r, r, 0, 90);

                        path.AddArc(0, this.Height - r - 1, r, r, 90, 90);

                        region = new Region(path);

                    }

                    break;

                default:

                    return;

            }

 

            this.Region = region;

        }