private Point mouseOffset; //记录鼠标指针的坐标 private bool isMouseDown = false; //记录鼠标按键是否按下 private void picCLose_Click(object sender, EventArgs e) { Application.Exit(); } private void fmLogin_MouseDown(object sender, MouseEventArgs e) { int xOffset; int yOffset; if (e.Button == MouseButtons.Left) { xOffset = -e.X - SystemInformation.FrameBorderSize.Width; yOffset = -e.Y - SystemInformation.CaptionHeight - SystemInformation.FrameBorderSize.Height; mouseOffset = new Point(xOffset, yOffset); isMouseDown = true; } } private void fmLogin_MouseMove(object sender, MouseEventArgs e) { if (isMouseDown) { Point mousePos = Control.MousePosition; mousePos.Offset(mouseOffset.X+5, mouseOffset.Y+30); Location = mousePos; } } private void fmLogin_MouseUp(object sender, MouseEventArgs e) { // 修改鼠标状态isMouseDown的值 // 确保只有鼠标左键按下并移动时，才移动窗体 if (e.Button == MouseButtons.Left) { isMouseDown = false; } }当窗口的formBorderStyle设置为None时，如何实现窗体拖动
原文：http://www.cnblogs.com/gengxin/p/5322930.html