using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
namespace API
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
Windows Form Designer generated code
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
[StructLayout(LayoutKind.Sequential)]
public struct LPPOINT
{
public long x;
public long y;
}
[DllImport("gdi32.dll")]
private static extern bool SetROP2(IntPtr hdc,int nDrawMode);
[DllImport("gdi32.dll")]
private static extern bool Rectangle
(IntPtr hdc,int X1, int Y1,int X2, int Y2);
[DllImport("gdi32.dll")]
private static extern long CreatePen(int nPenStyle,
int nWidth, long crColor);
[DllImport("gdi32.dll")]
private static extern long SelectObject(IntPtr hdc,
long hObject);
[DllImport("gdi32.dll")]
private static extern long DeleteObject(long hObject);
//绘矩形
public void Draw(Graphics g, long aColor)
{
IntPtr hdc;
hdc =g.GetHdc();
SetROP2(hdc, 10);
long p,oldP;
p = CreatePen(0, 1, aColor);
oldP = SelectObject(hdc, p);
Rectangle(hdc, 20, 150, 170, 250);
SelectObject(hdc, oldP);
DeleteObject(p);
g.ReleaseHdc(hdc);
}
protected override void OnPaint(PaintEventArgs e)
{
Graphics g = e.Graphics;
g.FillRectangle(Brushes.White, this.ClientRectangle);
//用GDI+函数绘一个兰色矩形
g.DrawRectangle(Pens.Blue, 20, 20, 150, 100);
//用API函数绘一个红色矩形
Draw(g,255);
}
}
}