C# 屏蔽鼠标单击操作

【核心代码】

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace MyProg
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form,IMessageFilter
	{
		public bool PreFilterMessage(ref System.Windows.Forms.Message SystemMessage)
		{
			if (SystemMessage.Msg >= 513 && SystemMessage.Msg <= 515) 
			{//不响应鼠标左键消息				
				return true;
			}
			return false;
		}
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		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.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(88, 40);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(136, 23);
			this.button1.TabIndex = 0;
			this.button1.Text = "禁止鼠标左键单击";
			this.button1.Click  = new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(88, 80);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(136, 23);
			this.button2.TabIndex = 1;
			this.button2.Text = "允许鼠标左键单击";
			this.button2.Click  = new System.EventHandler(this.button2_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(312, 150);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.MaximizeBox = false;
			this.Name = "Form1";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "演示屏蔽鼠标消息";
			this.ResumeLayout(false);

		}
		#endregion

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

		private void button1_Click(object sender, System.EventArgs e)
		{//禁止鼠标左键单击
			Application.AddMessageFilter(this);	
			MessageBox.Show("鼠标左键已被禁止，请用Tab键执行操作！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
		}

		private void button2_Click(object sender, System.EventArgs e)
		{//允许鼠标左键单击
			Application.RemoveMessageFilter(this);		
			MessageBox.Show("鼠标左键已解禁，可以执行操作！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
		}
	

	}
}