using System;
using Microsoft.Win32;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace IE进程管理
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnChangeIEProcessNum_Click(object sender, EventArgs e)
        {
            RegistryKey key = Registry.CurrentUser;
            RegistryKey ieProcessNum = key.OpenSubKey(@"Software\Microsoft\Internet Explorer\Main", true);
            string[] valueName;
            valueName = ieProcessNum.GetValueNames();
            foreach (string s in valueName)
            {

                if (s == "TabProcGrowth")
                {
                    
                    MessageBox.Show("键值存在", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
                if (s != "TabProcGrowth")//添加这部分后，程序就一直提示键值不存在，直到最后才输出键值存在。
                {
                    MessageBox.Show("键值不存在，要创建吗？", "提醒", MessageBoxButtons.OKCancel, MessageBoxIcon.Information);
                    return;
                }
           }
        }

    }
}

bool bFound = false;
foreach (string s in valueName)
            {

                if (s == "TabProcGrowth")
                {
                    bFound = true;
                    break;   
                 }
             }
if (bFound)
{
// 有
}
else
{
// 木有
}