C#中无边框窗体移动

拖动无边框窗体Form至桌面任何位置

Point mouseOff;//鼠标移动位置变量
bool leftFlag;//标记是否为左键
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 Form1_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 Form1_MouseUp(object sender, MouseEventArgs e)
{
if (leftFlag)
{
leftFlag = false;//释放鼠标后标注为false;
}
}