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