setwindowshookex

I'm creating a console application in which I'd like to record key presses (like the UP ARROW). I've created a Low Level Keyboard Hook that is supposed to capture all Key Presses in any thread and invoke my callback function, but it isn't working. The program stalls for a bit when I hit a key, but never invokes the callback. I've checked the documentation but haven't found anything. I don't know whether I'm using SetWindowsHookEx() incorrectly (to my knowledge it successfully creates the hook) or my callback function is incorrect! I'm not sure whats wrong! Thanks in advance for the help.

I have a DLL I inject into other processes using SetWindowsHookEx . Inside the DLL I increment the module's reference counter by calling GetModuleHandleEx so I can control when the module is unloaded. At this point the module reference count "should be" 2 from both of those API calls. When the calling process shuts down, it calls UnhookWindowsHookEx , decrementing the reference count to 1. The DLL has a thread that waits on a few things, one of them being the handle of the process that called SetWindowsHookEx . When the process goes away the DLL does some cleanup, terminates all threads,

I'm trying to hook the creation of a windows in my C# app. static IntPtr hhook = IntPtr.Zero; static NativeMethods.HookProc hhookProc; static void Main(string[] args) { // Dummy.exe is a form with a button that opens a MessageBox when clicking on it. Process dummy = Process.Start(@"Dummy.exe"); try { hhookProc = new NativeMethods.HookProc(Hook); IntPtr hwndMod = NativeMethods.GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName); hhook = NativeMethods.SetWindowsHookEx(HookType.WH_CBT, hhookProc, hwndMod, (uint)AppDomain.GetCurrentThreadId()); Console.WriteLine("hhook valid? {0}",

I am using SetWindowsHookEx() to create a keyboard hook. The creation seems to be successful but the procedure which is registered never gets called. Is there something I am doing wrong? #region Windows API Functions Declarations [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] private static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] private static extern bool UnhookWindowsHookEx(int idHook); [DllImport(

I'm trying to do a away timer style thing like Skype. If the user is 'away' for a period of time I'll trigger something. I have been using SetWindowsHookEx() with WM_KEYBOARD_LL which works fine. That is until you open a RDC connection and have it full screen. Then I never get the keyboard events. Anyone come across this? Or know of a better way to achieve this? I have actually tested skype and with a full screen RDC it will correctly go from Away to Online if I type in the RDC. Thanks EDIT: After Raymond Chen's comment I did some testing, and he is right. Can not believe I never found this

How do you properly unload a DLL from all processes when the system-wide hook that loaded them gets unloaded? From MSDN : You can release a global hook procedure by using UnhookWindowsHookEx, but this function does not free the DLL containing the hook procedure . This is because global hook procedures are called in the process context of every application in the desktop, causing an implicit call to the LoadLibrary function for all of those processes. Because a call to the FreeLibrary function cannot be made for another process, there is then no way to free the DLL. The system eventually frees

I am working on a program that uses keyboard hooks. However, when the PC that the program is running on is just slightly overloaded, it causes Windows to disconnect the hook from the program, causing it to no longer respond to keystrokes. Is there a way to prevent this, or even better, propose a different way of solving the exact same problem, by using a different architecture, maybe involving a pipeline? You can't "detect" this, and you absolutely shouldn't need to. What you're describing is a feature, specifically one introduced in Windows 7 to protect your system from rogue applications.