While sending Windows Messages to a certain key (Example S) it sometimes keeps any other keys which were held at the time to stay in a held down state.

I also noticed when making a call like:
If InputHelper.Keyboard.IsKeyDown(Keys.S) AndAlso InputHelper.Keyboard.IsKeyDown(Keys.LButton) Then InputHelper.WindowMessages.SendKeyPress(Keys.A) End If
it would sometimes randomly move my cursor, it doesn't always happen, just thought i'd point it out in case the issue was unknown.
(The two issues above happened in the 3.5 version and 4.0)

Lastly, this part isn't a bug, just a suggestion.
Instead of making a 4.x and a 3.5 version you could just create the .Clear StringBuilder extension in a module which would be compatible with both versions.
Example:
Imports System.Runtime.CompilerServices Imports System.Text Module Extensions <Extension()> Public Sub Clear(value As StringBuilder) value.Length = 0 value.Capacity = 0 End Sub End Module

example, i hook the keydown, if "ctrl + c" is pressed, i want to stop "copy" action.
how i do?
thanks a lot!

When instantiating a hook in a form the hook is not disposed together with the form when the form is closed.

Steps to reproduce

1. Create two forms.
2. Make one form open the other (for instance via a button click).
3. Put a keyboard and/or mouse hook in the second form.
4. Use the mouse/keyboard hook.
5. Close the second form.
6. Try to use the mouse/keyboard hook again.
7. It still works!

Code

Form1:

Public Class Form1

    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
        Using form2 As New Form2
            form2.ShowDialog()
        End Using
    End Sub
End Class

Form2:

Public Class Form2

    Dim KeyboardHook As New InputHelper.Hooks.KeyboardHook

    Private Sub Form2_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        AddHandler KeyboardHook.KeyDown, AddressOf KeyboardHook_KeyDown
    End Sub

    Private Sub KeyboardHook_KeyDown(sender As Object, e As InputHelper.EventArgs.KeyboardHookEventArgs)
        If e.Modifiers = (InputHelper.ModifierKeys.Control Or InputHelper.ModifierKeys.Shift) AndAlso e.KeyCode = Keys.E Then
            Debug.WriteLine("'CTRL + SHIFT + E' pressed at " & DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"))
        End If
    End Sub
End Class

Result

(Immediate Window, Visual Studio)

(Form2 opened by Form1)
(User presses CTRL + SHIFT + E)

'CTRL + SHIFT + E' pressed at 2019-08-17 02:26:49

(Form2 closed)
(User presses CTRL + SHIFT + E again)

'CTRL + SHIFT + E' pressed at 2019-08-17 02:27:03

Is there a way to have the hook called before that PowerPoint receives the event?
The goal here would be to use your (great) library to create custom keyboard shortcuts from a VSTO addin.
However, currently, when using a LocalKeyboardHook to capture the event CTRL + SHIFT + C, for instance, then PowerPoint's standard feature for "copy format" still occur before my addin deal (and tries to block) the event.

Is there a way for the hook to tell if its a user pressed key versus a input helper pressed key?

sorry not sure how to flag this as a question instead of an issue.

I am finding that mouse events are triggered OK when using a physical mouse, however when using a touch screen in certain applications, Chrome and Edge so far tested, no mouse events are getting triggered.

Also the Mouse Move event does not trigger in Adobe Acrobat when scrolling a PDF, but click events do trigger OK.

This only happens when using a touch screen.

As soon as the mouse is outside of chrome or edge then the mouse events start triggering again.

I did find someone else is having the issue with low level mouse hooks, but not this code, so it maybe a general limitation

https://stackoverflow.com/questions/50407901/capturing-touch-events-with-lowlevelmouseproc-does-not-work-for-all-applications

Any help would be appreciated, thanks

Hello Vincent,

I hope that you are doing well!

Quick question: are there events or actions that could "unhook" a keyboard local hook? And is there a way to track a local keyboard hook's status?

While I'm still struggling to reproduce this, I ended up several times with the local keyboard hook not working anymore while I was using PPT for regular work. I found out that disposing of the local keyboard hook, and then recreating it, allows to make it work again. But I did not manage (yet) to understand what made the previous local keyboard hook not work anymore, and I would be curious to know what happened and how I can investigate.

Best,

JB