C#编写的屏幕监控代码

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Windows.Forms; 
   
namespace Screen 
{ 
    public partial class Form1 : Form 
    { 
        public Form1() 
        { 
            //主窗体桌面不显示 仅在进程中显示 
            InitializeComponent(); 
            this.WindowState = FormWindowState.Minimized; 
            this.ShowInTaskbar = false; 
            SetVisibleCore(false); 
        } 
        protected override void SetVisibleCore(bool value) 
        { 
            base.SetVisibleCore(value); 
        }   
   
        private void timer1_Tick(object sender,EventArgs e) 
        { 
            //获得当前屏幕的大小  
            Rectangle rect = new Rectangle(); 
            rect = System.Windows.Forms.Screen.GetWorkingArea(this); 
            Size mySize = new Size(rect.Width,rect.Height); 
            Bitmap bitmap = new Bitmap(rect.Width,rect.Height); 
            Graphics g = Graphics.FromImage(bitmap); 
            g.CopyFromScreen(0,mySize); 
            string ImageName = DateTime.Now.ToString("yyyyMMdd_hhmmss") + ".jpg"; 
            bitmap.Save("F://screen//" + ImageName);  
            //释放资源 
            bitmap.Dispose(); 
            g.Dispose(); 
            GC.Collect();  
        } 
   
        private void Form1_Load(object sender,EventArgs e) 
        { 
            timer1.Enabled = true;//激活timer控件 
        } 
    } 
}