Скриншотер

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

namespace Screenshot
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void close_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void minimize_Click(object sender, EventArgs e)
        {
            this.WindowState = FormWindowState.Minimized;
        }

        public bool maximizeCounter = false;
        public int normalWidthForm = Form1.ActiveForm.Size.Width;
        public int normalHeightForm = Form1.ActiveForm.Size.Height;

        private void maximize_Click(object sender, EventArgs e)
        {
            if (maximizeCounter == false)
            {
                this.WindowState = FormWindowState.Maximized;
                SetButtonLocation();
                maximizeCounter = true;
            }
            else if (maximizeCounter == true)
            {
                this.WindowState = FormWindowState.Normal;
                SetButtonLocation();
                maximizeCounter = false;
            }
        }
        private void SetButtonLocation()
        {
            close.SetBounds(Width - close.Size.Width, close.Bounds.Y, close.Size.Width, close.Size.Height);
            minimize.SetBounds(Width - close.Size.Width - minimize.Size.Width - minimize.Size.Width,
                               minimize.Bounds.Y, minimize.Size.Width, minimize.Size.Height);
            maximize.SetBounds(Width - close.Size.Width - maximize.Size.Width, maximize.Bounds.Y, maximize.Size.Width,
                               maximize.Size.Height);
            centralPanel.SetBounds(pictureBox1.Size.Width + 1, centralPanel.Bounds.Y,
                                   Width - pictureBox1.Size.Width - close.Size.Width - minimize.Size.Width - maximize.Size.Width,
                                   centralPanel.Size.Height);
        }

        private Point mouseOffset;
        private bool isMouseDown = false;

        private void centralPanel_MouseDown(object sender, MouseEventArgs e)
        {
            int xOffset;
            int yOffset;

            if (e.Button == MouseButtons.Left)
            {
                xOffset = -e.X - SystemInformation.FrameBorderSize.Width - 39;
                yOffset = -e.Y - SystemInformation.CaptionHeight - SystemInformation.FrameBorderSize.Height + 36;
                mouseOffset = new Point (xOffset, yOffset);
                isMouseDown = true;
            }
        }

        private void centralPanel_MouseMove(object sender, MouseEventArgs e)
        {
            if (isMouseDown)
            {
                Point mousePos = Control.MousePosition;
                mousePos.Offset(mouseOffset.X, mouseOffset.Y);
                Location = mousePos;
            }
        }

        private void centralPanel_MouseUp(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                isMouseDown = false;
            }
        }

        private void centralPanel_Click(object sender, EventArgs e)
        {
            this.WindowState = FormWindowState.Normal;
            SetButtonLocation();
            maximizeCounter = false;
        }
    }
}