Capture any kind of keystrokes (aka keylogger), preferably c# .net but any kind will do

Question

I need to capture everything that I type on my keyboard and then store it in numerous ways. I\'d prefer it to be written in C# for .Net, but anything will do really. My reas

Answer 1

Old question but...

In Windows you can use the APIs of the user32.dll.

For a very simple keylogger you can use the method GetAsyncKeyState() checking whether each character of the ASCII table is pressed.

The whole code for a very simple and stupid keylogger written in a Console Application would be:

[DllImport("user32.dll")]
public static extern int GetAsyncKeyState(Int32 i);

static void Main(string[] args)
{
    while (true)
    {
        Thread.Sleep(100);

        for (int i = 0; i < 255; i++)
        {
            int keyState = GetAsyncKeyState(i);
            if (keyState == 1 || keyState == -32767)
            {
                Console.WriteLine((Keys)i);
                break;
            }
        }
    }

KeystrokeAPI

For those who are looking for something more robust and cleaner I've created an API that makes it easy. You only need to do this:

api.CreateKeyboardHook((character) => { Console.Write(character); });

More details here: https://github.com/fabriciorissetto/KeystrokeAPI