form1.cs

java基础方面的一些实例代码

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
namespace WM_COPYDATAc
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;
		private System.Windows.Forms.ListBox listBox1;
		const int WM_COPYDATA = 0x004A;
		private System.Windows.Forms.Button button1;
		int count=0;

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (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.listBox1 = new System.Windows.Forms.ListBox();
			this.button1 = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// listBox1
			// 
			this.listBox1.ItemHeight = 12;
			this.listBox1.Location = new System.Drawing.Point(24, 24);
			this.listBox1.Name = "listBox1";
			this.listBox1.Size = new System.Drawing.Size(288, 124);
			this.listBox1.TabIndex = 1;
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(128, 160);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(80, 23);
			this.button1.TabIndex = 2;
			this.button1.Text = "清空";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(336, 190);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.listBox1);
			this.Name = "Form1";
			this.Text = "接收方窗体";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		protected override void DefWndProc(ref System.Windows.Forms.Message m)
		{
			switch(m.Msg)
			{
				case WM_COPYDATA:
					string now = DateTime.Now.ToShortTimeString( )  ;
					count++;
					COPYDATASTRUCT mystr = new COPYDATASTRUCT();
					Type mytype = mystr.GetType();
					mystr =(COPYDATASTRUCT)m.GetLParam(mytype);
					this.listBox1.Items.Add(now+": "+mystr.lpData+" 收到的第"+count+"条信息");
					break;
				default:
					base.DefWndProc(ref m);
					break;
			}
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			this.listBox1.Items.Clear();
		}
	}
	public struct COPYDATASTRUCT
	{
		public IntPtr dwData;
		public int cbData;
		[MarshalAs(UnmanagedType.LPStr)] public string lpData;
	}
}