There is no built-in way to find out who sent the window message, not even win32k keeps track of this; you might be able to find it out with a kernel debugger and a conditional breakpoint. However, I would argue that you don’t really need this information; you need to make your app properly handle … Read more
You can’t do this with the NSEvent API, but you can do this with a CGEventTap. You can create an active event tap and register a callback that receives a CGEventRef and can modify it (if necessary) and return it to modify the actual event stream. EDIT Here’s a simple program that, while running, replaces … Read more
Source : Here Usage: To create the hook Private WithEvents kbHook As New KeyboardHook Then each event can be handled: Private Sub kbHook_KeyDown(ByVal Key As System.Windows.Forms.Keys) Handles kbHook.KeyDown Debug.WriteLine(Key.ToString) End Sub Private Sub kbHook_KeyUp(ByVal Key As System.Windows.Forms.Keys) Handles kbHook.KeyUp Debug.WriteLine(Key) End Sub Keyboard Hook Class : Imports System.Runtime.InteropServices Public Class KeyboardHook <DllImport(“User32.dll”, CharSet:=CharSet.Auto, CallingConvention:=CallingConvention.StdCall)> _ … Read more
It appears you need to call GetMessage or PeekMessage, which is odd – it is not mentioned in the documentation for Hooks or LowLevelKeyboardProc. I don’t know enough about this part of the API to guess at the reason. I just used the example classes: import com.sun.jna.examples.win32.*; public class Callback { public static User32.HHOOK hHook; … Read more
Stephen Toub wrote a great article on implementing global keyboard hooks in C#: using System; using System.Diagnostics; using System.Windows.Forms; using System.Runtime.InteropServices; class InterceptKeys { private const int WH_KEYBOARD_LL = 13; private const int WM_KEYDOWN = 0x0100; private static LowLevelKeyboardProc _proc = HookCallback; private static IntPtr _hookID = IntPtr.Zero; public static void Main() { _hookID = … Read more