C# 创造无边框，任意样式窗体，无边框窗体的移动

    public partial class Form2 : Form    {        public Form2()        {            InitializeComponent();        }        #region 创建无边框，任意样式窗体        private void Form2_Load(object sender, EventArgs e)        {            this.TransparencyKey = Color.White;             //设置默认透明色            this.BackColor = this.TransparencyKey;          //设置当前窗体的背景色为透明            this.FormBorderStyle = FormBorderStyle.None;    //隐藏窗体边框        }        #endregion        #region 控制无边框窗体的移动        //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);        private void pictureBox1_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);        }        ////常量        //int WM_SYSCOMMAND = 0x0112;        ////改变窗体大小        //int WMSZ_LEFT = 0xF001;        //int WMSZ_RIGHT = 0xF002;        //int WMSZ_TOP = 0xF003;        //int WMSZ_TOPLEFT = 0xF004;        //int WMSZ_TOPRIGHT = 0xF005;        //int WMSZ_BOTTOM = 0xF006;        //int WMSZ_BOTTOMLEFT = 0xF007;        //int WMSZ_BOTTOMRIGHT = 0xF008;        //ReleaseCapture();        //SendMessage(this.Handle, WM_SYSCOMMAND, WMSZ_BOTTOM, 0);        //SendMessage(this.Handle, WM_SYSCOMMAND, WMSZ_TOP, 0);        #endregion    }