指出错误 关于GDI
程序代码:
using System; using System.Collections.Generic; using using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace _5zq { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { } private void Form_paint(object sender, PaintEventArgs e) { Graphics g = e.Graphics; Pen pen = new Pen(Color.Red, 5); Point point1 = new Point(300, 100); Point point2=new Point(750,100); Point point3 = new Point(300,600); Point point4 = new Point(750, 600); g.DrawLine(pen, point1,point2); g.DrawLine(pen, point2, point3); g.DrawLine(pen, point3, point4); g.DrawLine(pen, point4, point1); } } }那里有错误啊 我总是显现不出我要画的内容