using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Drawing.Text;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace UseGdiPlus
{
	public partial class MainForm : Form
	{
		public MainForm()
		{
			InitializeComponent();

			this.Hide();
		}

		private void MainForm_Paint(object sender, PaintEventArgs e)
		{
			Color[] colors = new Color[]{
				Color.Red,
				Color.Green,
				Color.Blue,
				Color.Yellow
			};

			Pen p = new Pen(Color.Empty);

			int initX = 10, initY = 10;
			int initW = 200, initH = 150;
			int incr = 20;

			for(int i = 0; i < 4; i++)
			{
				p.Color = colors[i];
				p.Width = (i + 1) * 3.0f;

				int x = initX + i * incr;
				int y = initY + i * incr;
				int w = initW - i * incr * 2;
				int h = initH - i * incr * 2;

				e.Graphics.DrawRectangle(p, x, y, w, h);
			}

			p.Dispose();
		}

		private void MainForm_MouseMove(object sender, MouseEventArgs e)
		{
			Graphics g = this.CreateGraphics();
			Brush b = new SolidBrush(Color.Red);

			g.FillRectangle(b, e.X - 1, e.Y - 1, 1, 1);
			g.FillRectangle(b, -10, -10, 100, 100);
			b.Dispose();
			g.Dispose();
		}

		[DllImport("coredll", EntryPoint = "GetDC")]
		static extern IntPtr GetDC(IntPtr hwnd);
	}
}