C# GDI32 GDI plus

using System;

using System.Collections.Generic;

using System.Text;

using System.Drawing;

using System.Windows.Forms;

namespace EllipseExam

{

class GDI03 : Form

{

Button btnDraw = null;

[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]

//[System.Runtime.InteropServices.DllImport("gdi32.dll")]

private static extern bool Ellipse(IntPtr hdc,int nLeftRect, int nTopRect, int nRightRect, int nBottmRect);

// 헨들오프디바이스 컨텍스트 // 그래픽32를 쓸려면 있어야한다

public GDI03()

{

btnDraw = new Button();

btnDraw.Location = new Point(10, 10);

btnDraw.Size = new Size(50, 50);

btnDraw.Text = "타원그리기";

btnDraw.Click += new EventHandler(btnDraw_Click);

this.Text = "타원그리기 예제";

this.Controls.Add(btnDraw);

}

static void Main(string[] args)

{

Application.Run(new GDI03());

}

int x = 30;

private void btnDraw_Click(object sender, EventArgs e)

{

Graphics g = this.CreateGraphics();

//Pen p = new Pen(Color.BlueViolet);

//for (int i = 0; i < 10000; i++)

//{

//    g.DrawEllipse(p, x, 100, 200, 500);

//    x++;

//}

//g.Clear(Color.BlueViolet);

IntPtr hdc = new IntPtr();

hdc = g.GetHdc();

for (int i = 0, x = 1500 ; i < 10000 ; i++)

{

Ellipse(hdc, i+10, 0, 0, 1024);

}

g.Dispose();

}

}

}