c#无边框窗口的入门级拖动实现

实现了窗口的移动，下一步研究通过菜单拖动窗口

//窗口无任何控件

以下为form1.cs中的全部代码 多出的部分为添加部分（自行寻找）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication9
{
public partial class Form1 : Form
{
#region 本程序中用到的API函数
[DllImport("user32.dll")]
public static extern bool ReleaseCapture();
[DllImport("user32.dll")]
public static extern bool SendMessage(IntPtr hwdn, int wMsg, int mParam, int lParam);
#endregion
#region 本程序中需要声明的变量
public const int WM_SYSCOMMAND = 0x0112;//该变量表示将向Windows发送的消息类型
public const int SC_MOVE = 0xF010;//该变量表示发送消息的附加消息
public const int HTCAPTION = 0x0002;//该变量表示发送消息的附加消息
#endregion
private void ExitContext_Click(object sender, EventArgs e)
{
Application.Exit();//退出本程序
}
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
ReleaseCapture();
SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
}

public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{

}
}
}

以下代码为form1.designer.cs中的代码，改动代码已标记

namespace WindowsFormsApplication9
{
partial class Form1
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;

/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}

#region Windows 窗体设计器生成的代码

/// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{

//此处为添加代码*********
this.components = new System.ComponentModel.Container();
this.contextMenuStrip1 = new System.Windows.Forms.ContextMenuStrip(this.components);
this.ExitContext = new System.Windows.Forms.ToolStripMenuItem();
this.contextMenuStrip1.SuspendLayout();
//至此**********

this.SuspendLayout();
//
// Form1
//

//此处为添加代码*************

this.contextMenuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[]
{
this.ExitContext});
this.contextMenuStrip1.Name = "contextMenuStrip1";
this.contextMenuStrip1.Size = new System.Drawing.Size(101, 26);
//
// ExitContext
//
this.ExitContext.Name = "ExitContext";
this.ExitContext.Size = new System.Drawing.Size(100, 22);
this.ExitContext.Text = "退出";
this.ExitContext.Click += new System.EventHandler(this.ExitContext_Click);
//
// Frm_Main
//

//至此****************

this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
//此处为添加代码**********
this.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Stretch;
//至此******************

this.ClientSize = new System.Drawing.Size(284, 262);

//此处为添加代码***********

this.ContextMenuStrip = this.contextMenuStrip1;

//至此*******************

this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
this.Name = "Form1";

//此处为添加代码

this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;

//至此*************

this.Text = "Form1";

//此处为添加代码
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseDown);

this.contextMenuStrip1.ResumeLayout(false);
//至此************

this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);

}

#endregion
private System.Windows.Forms.ContextMenuStrip contextMenuStrip1;
private System.Windows.Forms.ToolStripMenuItem ExitContext;

}
}

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