当winform窗体的Bordestyle设置为None时，鼠标可以拖动窗体的办法

 方法一：
1   2015-07-11  16:05:35
bool formMove = false;//窗体是否移动
Point formPoint;//记录窗体的位置
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
formPoint = new Point();
int xOffset;
int yOffset;
if (e.Button == MouseButtons.Left)
{
xOffset = -e.X;
yOffset = -e.Y;
formPoint = new Point(xOffset, yOffset);
formMove = true;//开始移动
}
}

private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (formMove == true)
{
Point mousePos = Control.MousePosition;
mousePos.Offset(formPoint.X, formPoint.Y);
Location = mousePos;
}
}

private void Form1_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)//按下的是鼠标左键
{
formMove = false;//停止移动
}
}

[b]方法二：
[/b]

Point mouseOff;//鼠标移动位置变量
bool leftFlag;//标签是否为左键
private void Login_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 Login_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
Location = mouseSet;
}
}

private void Login_MouseUp(object sender, MouseEventArgs e)
{
if (leftFlag)
{
leftFlag = false;//释放鼠标后标注为false;
}
}