using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Drawing.Drawing2D;namespace advanced_drawing{  public partial class Form4 : Form  {    public Form4()    {      InitializeComponent();    }    private void button1_Click(object sender, EventArgs e)    {      //使用轉換將單位設置為英寸      Graphics g=this.CreateGraphics();      Matrix matrix = new Matrix();      matrix.Scale(g.DpiX, g.DpiY);      g.Transform = matrix;      Font rulerFont = new Font("MS Sans Serif", 8.25f / g.DpiY);      Pen blackPen=new Pen(Color.Black,0);      float rulerFontHeight = rulerFont.GetHeight(g);      RectangleF rulerRect = new RectangleF(0, 0, 6.5f, rulerFontHeight * 1.5f);      g.DrawRectangle(blackPen, rulerRect.X, rulerRect.Y, rulerRect.Width, rulerRect.Height);      Brush brush = System.Drawing.Brushes.Red;      g.DrawString("zhuzhao", rulerFont, brush, rulerRect);    }  }}