fabriciorissetto / keystrokeapi Goto Github PK

Error: "Additional information: A callback was made on a garbage collected delegate of type 'KeystrokeAPI!Keystroke.API.User32+LowLevelHook::Invoke'. This may cause application crashes, corruption and data loss. When passing delegates to unmanaged code, they must be kept alive by the managed application until it is guaranteed that they will never be called."

This error occurs to me if the program performs multiple operations

As title says, you have wrong condition in the Dispose method of the KeystrokeAPI class.

It is supposed to be

if (globalKeyboardHookId != IntPtr.Zero)
    User32.UnhookWindowsHookEx(globalKeyboardHookId);

instead of

if (globalKeyboardHookId == IntPtr.Zero)
    User32.UnhookWindowsHookEx(globalKeyboardHookId);

Also the overall design of the class is quite easy to create handle leaks - e.g. call twice CreateKeyboardHook and you are no longer able to unhook the hook.

There is a issue in this library in capturing keystrokes like entering the username and password in a Windows Modal/Popup Box of User Account Control.

Any workarounds for that ?

When running a program that uses your KeystrokeAPI but also when using the test app, at some point, mostly when the RAM consumption grew by approx. 3MB, the app throws a System.AccessViolationException. I can reproduce this Exception pretty easily by holding down backspace key on either machine i tried. Unfortunately there's no stack trace showing up. So can you figure out what might cause that Exception? Thanks!

Edit: To be more precise: It always happens after 720 pressed keys regardless of the exact key.

I geting random error

Managed Debugging Assistant 'CallbackOnCollectedDelegate' has detected a problem in 'D:\Programming\KeyLogger\KL\KL\bin\Debug\KL.vshost.exe'.

Additional information: A callback was made on a garbage collected delegate of type 'KeystrokeAPI!Keystroke.API.User32+LowLevelHook::Invoke'. This may cause application crashes, corruption and data loss. When passing delegates to unmanaged code, they must be kept alive by the managed application until it is guaranteed that they will never be called.

To reproduce need to open any Windows Explorer window and try to press any keys few times.

http://brian-federici.com/blog/2013/4/17/automatically-target-multiple-frameworks-in-your-nuget-package

Alt,
Ctrl
Fn
WinBtn

this API is great and worked like a charm but I am facing one issue once createkeyboardhook is called this hook is then permanent cannot cancel that hook by calling dispose function or by nulling the api object . . it is requested to provide a built in unhook method

Greetings!

thanks to develop this api but i have an issue on using it. when i run using win form application it gives call back error and my application stops running. Details as follows..

A call back was made on garbage collected delegate of type "keystroke-api"..

plz resolve this issue

thanks

code attached
Code4github.txt

Why it only reads English characters?!

bool isLogging = true;

        while (isLogging)
        {
            if (!offlineKeyLogging)
            {
                isLogging= false;
                try
                {
                    Application.DoEvents();
                    keyAPIOf.Dispose();
                    GC.Collect();
                    GC.EndNoGCRegion();
                }
                catch (Exception ex)
                {
                    Application.DoEvents();
                }
            }
            Application.DoEvents();
        }

Hello, what is the license for the lib? I would be interested in using it in a project, which will be sold.