Form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace zbutt
{
    public partial class remresfm : Form
    {
        public const int HT_CAPTION = 0x2;
        [DllImportAttribute("user32.dll")]
        public static extern int SendMessage(IntPtr hWnd,
            int Msg, int wParam, int lParam);
        [DllImportAttribute("user32.dll")]
        public static extern bool ReleaseCapture();
        public const int WM_NCLBUTTONDOWN = 0xA1;

        public remresfm()
        {
            InitializeComponent();
        }

        private void glassButton2_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        public void setText(String s)
        {
            textBox1.Text = s;
        }

        private void remresfm_MouseDown(object sender, MouseEventArgs e)
        {
            ReleaseCapture();
            SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
        }
    }
}