winform --无边框窗体 --窗体移动API

无边框窗体：

就是吧窗体的边框去掉，然后自己做按钮设置功能。

---移入变色

//鼠标移入变色
        private void pictureBox2_MouseEnter(object sender, EventArgs e)
        {
            //pictureBox2.BackColor = Color.Red;
            pictureBox2.Image = Image.FromFile("G:\0425\6、WinForm\2016-7-4\Buttons\btn_close_highlight.png");
        }

        //鼠标按下变色
        private void pictureBox2_MouseDown(object sender, MouseEventArgs e)
        {
            //pictureBox2.BackColor = Color.Navy;
            pictureBox2.Image = Image.FromFile("G:\0425\6、WinForm\2016-7-4\Buttons\btn_close_down.png");
        }
        //鼠标移出变色
        private void pictureBox2_MouseLeave(object sender, EventArgs e)
        {
            //pictureBox2.BackColor = Color.Transparent;
            pictureBox2.Image = Image.FromFile("G:\0425\6、WinForm\2016-7-4\Buttons\btn_close_disable.png");
        }
        //点击事件
        private void pictureBox2_Click(object sender, EventArgs e)
        {
            MessageBoxButtons mb = MessageBoxButtons.OKCancel;
            DialogResult dr = MessageBox.Show("是否退出？", "退出", mb);
            if (dr == DialogResult.OK)
            {
                this.Close();
            }

        }

无边框窗体的移动：

将下面代码直接复制粘贴，将窗体的鼠标按下事件的方法改成下面方法的名字就可以直接使用

//窗体移动API
        [DllImport("user32.dll")]
        public static extern bool ReleaseCapture();
        [DllImport("user32.dll")]
        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int IParam);
        public const int WM_SYSCOMMAND = 0x0112;
        public const int SC_MOVE = 0xF010;
        public const int HTCAPTION = 0x0002;
        [DllImport("user32")]
        private static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, IntPtr lParam);
        private const int WM_SETREDRAW = 0xB;

        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            if (this.WindowState == FormWindowState.Normal)
            {
                ReleaseCapture();
                SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
            }
        }