Stephen Toub - All Comments

re: Low-Level Keyboard Hook in C#

Markus Florian — Thu, 09 Feb 2012 15:06:35 GMT

Is there a way to know which device send the input?

i need to identify the input source because i want to filter the barcode scanner

re: Low-Level Keyboard Hook in C#

Richard_Bos — Thu, 09 Feb 2012 13:08:47 GMT

Thanks, made my tool complete. :)

re: Low-Level Keyboard Hook in C#

Koopakiller — Thu, 26 Jan 2012 20:59:35 GMT

Thanks for this code.

re: Preview Handler Association Editor

wha happa? — Tue, 24 Jan 2012 22:41:55 GMT

Link went dead!!! >,< anyone know where this can be found now for DL?

re: Low-Level Keyboard Hook in C#

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re: Preview Handler Association Editor

txg — Mon, 28 Nov 2011 20:15:28 GMT

anyone know if this can be used to preview ebook files like .mobi or .epub?

re: Error 2869 when installing preview handlers MSI

Serch — Thu, 17 Nov 2011 14:09:48 GMT

Very good that worked for me too

Thanks Craig!!

re: Low-Level Keyboard Hook in C#

Jose Maali — Thu, 17 Nov 2011 08:43:06 GMT

I am trying to run this application as task (on Task Scheduler) on Windows 7 but there is an issue which I couldn't figure out.

It might be because of either threading or security?

Has anyone run this code as a task or it is not possible?

re: Fun with DVR-MS (now on my blog)

wellbaby — Tue, 01 Nov 2011 09:10:17 GMT

The following article just aims to provide a step by step guide on how to convert DVR to popular video formats; it is also available for converting the extended DVR that is WTV to various video formats at www.bigasoft.com/.../convert-dvr-with-dvr-converter.html

Convert DVR to AVI or WMV for playback DVR in Window Media Player, Xbox and more or edit DVR in Windows Movie Maker.

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re: Time Travel with Media Center

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re: When (a+b)+c != a+(b+c)...

yyww — Thu, 13 Oct 2011 01:20:09 GMT

Make non sense.

re: Error 2869 when installing preview handlers MSI

Anthony — Tue, 06 Sep 2011 20:55:45 GMT

Editing via Orca worked for me.

Note : after installing the SDK, I had to go into the bin directory and run the orca.msi to install it first.

I changed the following items in the 'Actions' table of the 'CustomAction' table in the tree:

1. Action : _AB820976_0EA4_4E19_BEDE_1DC36EE983CC.uninstall

Type : 3137

2. _C48321CF_535F_4B4A_9285_5820A8755CB3.uninstall

Type : 3137

3. _52271FF7_D1DD_4592_AD36_59CE93376C99.install

Type : 3137

4. _589FE841_B688_4D69_BA20_988A01C12EEC.install

Type : 3137

Don't forget to Save. Exit Orca, Then the install.bat and PreviewHandlers setup.msi will run/install.

re: OutlookContactProvider

test_10 — Mon, 04 Jul 2011 09:07:30 GMT

when this code run on vs2005 then get error msdn.outlook.contacts.global ambiguous.

re: Low-Level Keyboard Hook in C#

Allan Chen — Wed, 15 Jun 2011 16:11:27 GMT

my problem is that whe using low level key board hook in a console app, it can get the key information when the app lost focus which is expected, but when I change this code a little bit and make it works in a win form app, it can only get the key information just when the window get focus, but when it lost focus, it cannot get the key information anymore.

re: Preview Handler Association Editor

Marko — Wed, 15 Jun 2011 11:12:58 GMT

Is there a way to preview files in simple windows form. It looks like Preview Handlers form the article are embedded and cannot be used in code, only in Windows?

Thanks

re: Preview Handler Association Editor

Michael — Mon, 13 Jun 2011 05:58:12 GMT

Just wanted to say thank you for this. I've been trying to get flac files to play in explorer for ages and this was the key! :)

Thanks again

re: Low-Level Keyboard Hook in C#

mj121 — Fri, 10 Jun 2011 09:27:02 GMT

hi Stephen,

nice article!!! how can i perform this.. ex: first press A and then B after that AB becomes C..? (deleting both A and B)

press A -> A

press B -> C (generally this is AB)

cheers

re: Low-Level Mouse Hook in C#

Oliver — Thu, 19 May 2011 15:51:54 GMT

Awsome! Thanks publishing this piece!

re: Preview Handler Association Editor

Mizan Rahman — Tue, 17 May 2011 19:58:54 GMT

Hi Stephen,

I need to host the preview handler on a C# Form. For example, suppose I have a full path of a text file (.txt), I would like to preview the file within a GroupBox control on a .NET WinForm. How can I do that?

Thank you for this great article.

re: Low-Level Mouse Hook in C#

ken — Thu, 12 May 2011 20:02:09 GMT

i converted the C# code to vb net ith one of those tools.

I have problem with this line

Private Shared _proc As LowLevelMouseProc = HookCallback()

it wants the parameters,

what should they be???

Ken

vb net 2008 below code

Class InterceptMouse

'imports System;

'imports System.Collections.Generic;

'imports System.Runtime.InteropServices;

'imports System.Diagnostics;

'imports System.Windows.Forms

Private Shared _proc As LowLevelMouseProc = HookCallback()

Private Shared _hookID As IntPtr = IntPtr.Zero

Public Shared Sub Main()

_hookID = SetHook(_proc)

Application.Run()

UnhookWindowsHookEx(_hookID)

End Sub

Private Shared Function SetHook(ByVal proc As LowLevelMouseProc) As IntPtr

Using curProcess As Process = Process.GetCurrentProcess()

Using curModule As ProcessModule = curProcess.MainModule

Return SetWindowsHookEx(WH_MOUSE_LL, proc, GetModuleHandle(curModule.ModuleName), 0)

End Using

End Function

Private Delegate Function LowLevelMouseProc(ByVal nCode As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr

Private Shared Function HookCallback(ByVal nCode As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr

If nCode >= 0 AndAlso MouseMessages.WM_LBUTTONDOWN = CType(wParam, MouseMessages) Then

Dim hookStruct As MSLLHOOKSTRUCT = CType(Marshal.PtrToStructure(lParam, GetType(MSLLHOOKSTRUCT)), MSLLHOOKSTRUCT)

Console.WriteLine(hookStruct.pt.x & ", " & hookStruct.pt.y)

End If

Return CallNextHookEx(_hookID, nCode, wParam, lParam)

End Function

Private Const WH_MOUSE_LL As Integer = 14

Private Enum MouseMessages

WM_LBUTTONDOWN = &H201

WM_LBUTTONUP = &H202

WM_MOUSEMOVE = &H200

WM_MOUSEWHEEL = &H20A

WM_RBUTTONDOWN = &H204

WM_RBUTTONUP = &H205

End Enum

<StructLayout(LayoutKind.Sequential)> _

Private Structure POINT

Public x As Integer

Public y As Integer

End Structure

<StructLayout(LayoutKind.Sequential)> _

Private Structure MSLLHOOKSTRUCT

Public pt As POINT

Public mouseData As UInteger

Public flags As UInteger

Public time As UInteger

Public dwExtraInfo As IntPtr

End Structure

<DllImport("user32.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _

Private Shared Function SetWindowsHookEx(ByVal idHook As Integer, ByVal lpfn As LowLevelMouseProc, ByVal hMod As IntPtr, ByVal dwThreadId As UInteger) As IntPtr

End Function

<DllImport("user32.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _

Private Shared Function UnhookWindowsHookEx(ByVal hhk As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean

End Function

<DllImport("user32.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _

Private Shared Function CallNextHookEx(ByVal hhk As IntPtr, ByVal nCode As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr

End Function

<DllImport("kernel32.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _

Private Shared Function GetModuleHandle(ByVal lpModuleName As String) As IntPtr

End Function

End Class

re: Edit DVR-MS Metadata

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re: Low-Level Keyboard Hook in C#

anant — Mon, 21 Feb 2011 09:14:43 GMT

how can i use the same for compact framework??

re: Low-Level Keyboard Hook in C#

Jalle — Sat, 19 Feb 2011 09:34:52 GMT

Does any1 know if I can store this KeyboardHook code in seperate Class or Module ?

I dont want to mix all this KeyboardHook with other ode in my form so I would like to have it in external module or class file?

I belive this is simple, but I am not so familiar with it ..

re: Low-Level Mouse Hook in C#

TweaK — Tue, 15 Feb 2011 14:59:15 GMT

Does anyone have a working example of this in a Solution??

This LowLevel stuff is new to me and i don't see how to get it working..

Everything compiles and runs, but the Output window remains empty :x

re: Low-Level Keyboard Hook in C#

Monosodium — Thu, 10 Feb 2011 14:09:54 GMT

@JCooke - I think this is too high-level for your needs.

I'm working on a project with some similar requirements and you'd need to look at using GetRawInputData from User32.dll. www.codeproject.com/.../rawinput.aspx probably has what you need though.