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  • C# 无边框窗口实现拖动

    原文地址:http://blog.csdn.net/sky___ice/article/details/11533321


    Form1.Designer.cs:

    //

    //Form1

    //

                this.MouseDown += new System.Windows.Forms.MouseEventHandler(Form_MouseDown);
                this.MouseMove += new System.Windows.Forms.MouseEventHandler(Form_MouseMove);
                this.MouseUp += new System.Windows.Forms.MouseEventHandler(Form_MouseUp);
    

    Form1.cs


            #region 无边框窗体拖动
            //-------------------无边框窗体拖动---------------------------
            Point mouseOff;//鼠标移动位置变量
            bool leftFlag;//标签是否为左键
            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 Form_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
                    (((System.Windows.Forms.PictureBox)sender).Parent).Location = mouseSet;
                }
            }
            private void Form_MouseUp(object sender, MouseEventArgs e)
            {
                if (leftFlag)
                {
                    leftFlag = false;//释放鼠标后标注为false;
                }
            }
    
            [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;
    
            private void Form_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
            {
                ReleaseCapture();
                SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
            }
            //------------------------end 无边框窗体拖动-----------------------------------
            #endregion


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  • 原文地址:https://www.cnblogs.com/alfredsun/p/4467241.html
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