C# デスクトップに検索ボックス

昔、デスクトップに検索ボックスを表示するアプリがあった気がして、同じようなものを作りはじめてみたが、どうも使わなそうなので中止。

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;

namespace 検索ボックス
{
    public partial class Form1 : Form
    {
        private Point mouse_point;
        public Form1()
        {
            InitializeComponent();

            load_xml();

            NotifyIcon ic = new NotifyIcon();
            ic.Visible = true;
            ic.Icon = Icon;
            ic.MouseDoubleClick += new MouseEventHandler((object sender, MouseEventArgs e) => {
                this.Close();
            });

            this.ShowInTaskbar = false;

            this.FormBorderStyle = FormBorderStyle.None;
            this.TransparencyKey = this.BackColor;

            this.comboBox1.AutoCompleteMode = AutoCompleteMode.Append;
            this.comboBox1.AutoCompleteSource = AutoCompleteSource.ListItems;

            this.comboBox1.MouseDown += new MouseEventHandler((object sender, MouseEventArgs e)=> {
                if(e.Button == MouseButtons.Left)
                {
                    mouse_point = new Point(e.X, e.Y);
                }
            });
            this.comboBox1.MouseMove += new MouseEventHandler((object sender, MouseEventArgs e)=> {
                if(e.Button == MouseButtons.Left)
                {
                    this.Left += e.X - mouse_point.X;
                    this.Top += e.Y - mouse_point.Y;
                }
            });
            this.comboBox1.KeyDown  += new KeyEventHandler((object sender, KeyEventArgs e) => {
                if(e.KeyCode == Keys.Enter)
                {
                    string tmp = Uri.EscapeDataString(comboBox1.Text);
                    System.Diagnostics.Process.Start(@"https://www.google.co.jp/search?q=" + tmp);
                    comboBox1.Items.Add(comboBox1.Text);
                    save_xml();
                }
            });
        }
        private void load_xml()
        {
            if (!System.IO.File.Exists(Application.StartupPath + @"\dat.xml")) return;

            System.Xml.Serialization.XmlSerializer xs = new System.Xml.Serialization.XmlSerializer(typeof(string[]));
            System.IO.StreamReader sr = new System.IO.StreamReader(Application.StartupPath + @"\dat.xml", new UTF8Encoding(false));
            string[] items = (string[])xs.Deserialize(sr);
            comboBox1.Items.AddRange(items);
            sr.Close();
        }

        private void save_xml()
        {
            System.Xml.Serialization.XmlSerializer xs = new System.Xml.Serialization.XmlSerializer(typeof(string[]));
            System.IO.StreamWriter sw = new System.IO.StreamWriter(Application.StartupPath + @"\dat.xml", false, new UTF8Encoding(false));
            List<string> items = comboBox1.Items.Cast<string>().ToList();
            xs.Serialize(sw, items.ToArray());
            sw.Close();
        }
    }
}

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;

namespace 検索ボックス

{

public partial class Form1 : Form

{

private Point mouse_point;

public Form1()

{

InitializeComponent();

load_xml();

NotifyIcon ic = new NotifyIcon();

ic.Visible = true;

ic.Icon = Icon;

ic.MouseDoubleClick += new MouseEventHandler((object sender, MouseEventArgs e) => {

this.Close();

});

this.ShowInTaskbar = false;

this.FormBorderStyle = FormBorderStyle.None;

this.TransparencyKey = this.BackColor;

this.comboBox1.AutoCompleteMode = AutoCompleteMode.Append;

this.comboBox1.AutoCompleteSource = AutoCompleteSource.ListItems;

this.comboBox1.MouseDown += new MouseEventHandler((object sender, MouseEventArgs e)=> {

if(e.Button == MouseButtons.Left)

{

mouse_point = new Point(e.X, e.Y);

}

});

this.comboBox1.MouseMove += new MouseEventHandler((object sender, MouseEventArgs e)=> {

if(e.Button == MouseButtons.Left)

{

this.Left += e.X - mouse_point.X;

this.Top += e.Y - mouse_point.Y;

}

});

this.comboBox1.KeyDown += new KeyEventHandler((object sender, KeyEventArgs e) => {

if(e.KeyCode == Keys.Enter)

{

string tmp = Uri.EscapeDataString(comboBox1.Text);

System.Diagnostics.Process.Start(@"https://www.google.co.jp/search?q=" + tmp);

comboBox1.Items.Add(comboBox1.Text);

save_xml();

}

});

}

private void load_xml()

{

if (!System.IO.File.Exists(Application.StartupPath + @"\dat.xml")) return;

System.Xml.Serialization.XmlSerializer xs = new System.Xml.Serialization.XmlSerializer(typeof(string[]));

System.IO.StreamReader sr = new System.IO.StreamReader(Application.StartupPath + @"\dat.xml", new UTF8Encoding(false));

string[] items = (string[])xs.Deserialize(sr);

comboBox1.Items.AddRange(items);

sr.Close();

}

private void save_xml()

{

System.Xml.Serialization.XmlSerializer xs = new System.Xml.Serialization.XmlSerializer(typeof(string[]));

System.IO.StreamWriter sw = new System.IO.StreamWriter(Application.StartupPath + @"\dat.xml", false, new UTF8Encoding(false));

List<string> items = comboBox1.Items.Cast<string>().ToList();

xs.Serialize(sw, items.ToArray());

sw.Close();

}