First, set the FormBorderStyle of the form to none and the WindowState to Maximized so that the form occupies the entire page.
form form code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Net;
using System.IO;
using System.Security.Cryptography;
using System.Drawing.Drawing2D;
using System.Management;
using System.Management.Instrumentation;
namespace UI
{
public partial class Form1 : Form
{
Hook h = new Hook();
public Form1()
{
InitializeComponent();
}
string password;
private void Form1_Load(object sender, EventArgs e)
{
FullScreen();
Locations();
txt_pwd.Focus();
lb_name.Text = this.HostName;
showhead();
h.Hook_Start();
tm_kill.Start();
WritePwd();
}
public void showhead()// Avatar display
{
if (File.Exists(@"C:\Windows\System32\Face.bmp"))
{
pic_head.ImageLocation = @"C:\Windows\System32\Face.bmp";
}
else
{
pic_head.Image = UI.Properties.Resources.WIN8Head;
}
}
string pwd2 = null;
protected override bool ProcessKeyEventArgs(ref Message m)//Disable task manager
{
KillTaskmgr ();
return base.ProcessKeyEventArgs(ref m);
}
protected override void WndProc(ref Message m)//Disable the right mouse button
{
if (m.Msg == 0x205)
{
}
base.WndProc(ref m);
}
public void WritePwd()//Write configuration file
{
if (File.Exists(@"C:\Windows\System32\lock.pwd"))
{
password = File.ReadAllText(@"C:\Windows\System32\lock.pwd", Encoding.Default);
if (File.Exists(@"C:\Windows\System32\unlock.ID"))
{
pwd2 = File.ReadAllText(@"C:\Windows\System32\unlock.ID", Encoding.Default);
}
else
pwd2 = null;
}
else
{
password = MD5(UI.frmLogin.PWD);
}
}
public string HostName//This machine name
{
get
{
// string hostname = Dns.GetHostName();
string hostname = Convert.ToString (UI.frmLogin.CardID);
return hostname;
}
}
public void Locations()//The position of the control relative to the screen
{
Rectangle ScreenArea = System.Windows.Forms.Screen.GetBounds(this);
int width = ScreenArea.Width; //Screen width
int height = ScreenArea.Height;
pl_login.Location = new Point((width - 480) / 2, (height - 200) / 2);
bt_about1.Location = new Point(bt_about1.Location.X, height - 50);
pl_about.Location = new Point(pl_about.Location.X, height - 140);
}
private void KillTaskmgr()//Disable Task Manager
{
Process[] sum = Process.GetProcesses();
foreach (Process p in sum)
{
if (p.ProcessName == "taskmgr" || p.ProcessName == "cmd")
try
{
p.Kill();
}
catch
{
;
}
}
}
private void FullScreen()//Full screen
{
this.SetVisibleCore(true);
}
//Add the functions that need to be implemented according to your own needs
private void bt_login_Click(object sender, EventArgs e)//Login unlock
{
if (pwd2 != null)
{
if (txt_pwd.Text.Trim() == Convert.ToString(UnlockID(), 16).ToUpper())
{
pwd2 = null;
MessageBox.Show("PIN code unlocked successfully! Password reset to 123", "Prompt");
return;
}
}
if (txt_pwd.Text != "")
{
if (MD5(txt_pwd.Text) == password)
{
pwd2 = null;
h.Hook_Clear();
// Application.Exit(); //Close the program
bool status = false;
bool flag = new Facade.ConsumerFacade().ModifyLineLog(UI.frmLogin.CardID, status);//Set on-hook status
this.Hide();
}
else
{
pl_info.Visible = true;
tm_info.Start();
txt_pwd.Text = "";
}
}
}
private void timer1_Tick(object sender, EventArgs e)//Start to top
{
KillTaskmgr ();
}
public static string MD5(string word)//MD5 encryption
{
MD5 md5 = new MD5CryptoServiceProvider();
byte[] result = md5.ComputeHash(System.Text.Encoding.Default.GetBytes(word));
return System.Text.Encoding.Default.GetString(result);
}
#region//The setting of the blank part of the mouse click disappears
private void Form1_Click(object sender, EventArgs e)
{
this.AcceptButton = bt_login;
}
#endregion
private void tm_info_Tick(object sender, EventArgs e)//The prompt information disappears
{
pl_info.Visible = false;
tm_info.Stop();
}
private void bt_about1_Click(object sender, EventArgs e)
{
if (pl_about.Visible == false)
pl_about.Visible = true;
else
pl_about.Visible = false;
}
public string GetMoAddress()// Get the hardware address of the network card
{
return null;
}
private void bt_about_Click(object sender, EventArgs e)//关于
{
MessageBox.Show("Software Name: Everyday See Internet Cafe Charging System\n\nAuthor: Du Xiaoyu\n\nVersion: 1.0\n\nThe lock screen password is the same as the login password\n\nIf there is a bug, please send a bug The details appear to\nmail [email protected] for improvement", "About", MessageBoxButtons.OK);
}
public long UnlockID()//Return PIN code
{
long a = 123;
return a;
}
private void bt_shutdown_Click(object sender, EventArgs e)//关机
{
DialogResult dr = MessageBox.Show("Are you sure you want to shut down?", "Prompt", MessageBoxButtons.OKCancel);
if (dr == DialogResult.OK)
ApiCalls.ShutDown();
}
}
}
Create a new HOOK class and set the hook
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Diagnostics;
namespace UI
{
public class Hook
{
public delegate int HookProc(int nCode, int wParam, IntPtr lParam);
static int hHook = 0;
public const int WH_KEYBOARD_LL = 13;
//LowLevel keyboard interception, if it is WH_KEYBOARD=2, the system keyboard cannot be intercepted, Acrobat Reader will obtain the keyboard before you intercept it.
HookProc KeyBoardHookProcedure;
//Keyboard Hook structure function
[StructLayout(LayoutKind.Sequential)]
public class KeyBoardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
#region DllImport
//set the hook
[DllImport("user32.dll")]
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
// remove the hook
public static extern bool UnhookWindowsHookEx(int idHook);
[DllImport("user32.dll")]
// call the next hook
public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam);
[DllImport("kernel32.dll")]
public static extern int GetCurrentThreadId();
[DllImport("kernel32.dll")]
public static extern IntPtr GetModuleHandle(string name);
#endregion
#region Custom Events
public void Hook_Start()
{
// install keyboard hook
if (hHook == 0)
{
KeyBoardHookProcedure = new HookProc(KeyBoardHookProc);
hHook = SetWindowsHookEx(WH_KEYBOARD_LL,
KeyBoardHookProcedure,
GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0);
//If setting the hook fails.
if (hHook == 0)
{
Hook_Clear();
throw new Exception();
}
else
{
}
}
}
// cancel the hook event
public void Hook_Clear()
{
bool retKeyboard = true;
if (hHook != 0)
{
retKeyboard = UnhookWindowsHookEx(hHook);
hHook = 0;
}
//If removing the hook fails.
if (!retKeyboard) throw new Exception("UnhookWindowsHookEx failed.");
}
//Here you can add the information processing you want
public static int KeyBoardHookProc(int nCode, int wParam, IntPtr lParam)
{
if (nCode >= 0)
{
KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct));
int v = kbh.vkCode;
switch (v)
{
case 27://ESC key
case 91://left logo key
case 92://right logo key
case 93://right mouse button shortcut
case 164://
case 9://TAB键
case 10://Shift键
case 17://Ctrl key
case 18://Alt key
case 162://
case 110://.key
case 46: // Delete Key
case 115://F4 key
case 241://F1 key
return 1;
}
}
return CallNextHookEx(hHook, nCode, wParam, lParam);
}
#endregion
}
}
In order to be beautiful, the form uses some controls, you need to add some background pictures and put them in the Resoures folder. When you click the Win picture in the lower left corner, it will display "shutdown" and "about", otherwise it will be hidden.
