-----------------------------------------------------------‘接收窗体’代码.cs------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication2
{
/// <summary>
/// 接收窗体
/// </summary>
public partial class ReceiveForm : Form
{
SendForm sendForm;
public ReceiveForm()
{
InitializeComponent();
sendForm = new SendForm(this.Handle);
sendForm.Show();
}
public const int USER = 0x500;
/// <summary>
/// 自定义消息
/// </summary>
public const int MYMESSAGE = 0x500 + 1;
/// <summary>
/// 重写窗体的消息处理函数DefWndProc，从中加入自己定义消息 MYMESSAGE 的检测的处理入口
/// </summary>
/// <param name="m"></param>
protected override void DefWndProc(ref Message m)
{
switch (m.Msg)
{
//接收自定义消息MYMESSAGE，并显示其参数
case MYMESSAGE:
SENDDATASTRUCT myData = new SENDDATASTRUCT();//这是创建自定义信息的结构
Type mytype = myData.GetType();
myData = (SENDDATASTRUCT)m.GetLParam(mytype);//这里获取的就是作为LParam参数发送来的信息的结构
textBox1.Text = myData.lpData; //显示收到的自定义信息
break;
default:
base.DefWndProc(ref m);
break;
}
}
}
}
-----------------------------------------------------------‘接收窗体’代码.Desiger.cs------------------------------------------------------------
namespace WindowsFormsApplication2
{
/// <summary>
/// 接收窗体
/// </summary>
partial class ReceiveForm
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(30, 72);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(189, 21);
this.textBox1.TabIndex = 0;
//
// ReceiveForm
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(270, 174);
this.Controls.Add(this.textBox1);
this.Name = "ReceiveForm";
this.Text = "ReceiveForm";
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
public System.Windows.Forms.TextBox textBox1;
}
}
-----------------------------------------------------------’发送窗体‘代码.cs------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace WindowsFormsApplication2
{
/// <summary>
/// 发送窗体
/// </summary>
public partial class SendForm : Form
{
public SendForm()
{
InitializeComponent();
}
public SendForm(IntPtr Handle)
{
SendToHandle = Handle;
InitializeComponent();
}
/// <summary>
/// 接收窗口的句柄
/// </summary>
private IntPtr SendToHandle;
public const int USER = 0x500;
/// <summary>
/// 自定义的消息ID
/// </summary>
public const int MYMESSAGE = USER + 1;
/// <summary>
///消息发送API
/// </summary>
/// <param name="hWnd">信息发往的窗口的句柄</param>
/// <param name="Msg">消息ID</param>
/// <param name="wParam">貌似没用</param>
/// <param name="lParam">传输的数据参数</param>
/// <returns></returns>
[DllImport("User32.dll", EntryPoint = "SendMessage")]
private static extern int SendMessage(
IntPtr hWnd, // 信息发往的窗口的句柄
int Msg, // 消息ID
int wParam, // 参数1
ref SENDDATASTRUCT lParam // 参数2 [MarshalAs(UnmanagedType.LPTStr)]StringBuilder lParam
);
/// <summary>
/// 发送消息 调用SendMessage API
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Send_Click(object sender, EventArgs e)
{
string myText = textBox1.Text;
SENDDATASTRUCT myData = new SENDDATASTRUCT();
myData.lpData = myText;
SendMessage(SendToHandle, MYMESSAGE, 100, ref myData);//发送自定义消息给句柄为SendToHandle 的窗口,
}
}
}
-----------------------------------------------------------’发送窗体‘代码.Desiger.cs------------------------------------------------------------
namespace WindowsFormsApplication2
{
/// <summary>
/// 发送窗体
/// </summary>
partial class SendForm
{
/// <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()
{
this.Send = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// Send
//
this.Send.Location = new System.Drawing.Point(299, 69);
this.Send.Name = "Send";
this.Send.Size = new System.Drawing.Size(75, 23);
this.Send.TabIndex = 0;
this.Send.Text = "Send";
this.Send.UseVisualStyleBackColor = true;
this.Send.Click += new System.EventHandler(this.Send_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(48, 71);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(228, 21);
this.textBox1.TabIndex = 1;
//
// SendForm
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(415, 166);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.Send);
this.Name = "SendForm";
this.Text = "SendForm";
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.Button Send;
private System.Windows.Forms.TextBox textBox1;
}
}
-----------------------------------------------------------’程序入口‘代码------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace WindowsFormsApplication2
{
static class Program
{
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new ReceiveForm());
}
}
}
------------------------------------总结----------------------------------------------------------------
1） 在发送窗体 调用API方法发送
2） 在接收窗体 重写窗体的消息处理函数DefWndProc 在m参数里面取出传过来的值
