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Mostly cause I'm tired and not interested in pursuing that particular knowledge
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But I didn't read all of that info to see if it's true or how to use it. So it seems that using DebugProc somehow you may be able to disallow hooks to get information or something. The system passes information about the hook to be called to theÄebugProc hook procedure, which examines the information and determines whether to allow the hook to be called". The system calls this function before calling the hook procedures associated with any type of hook.
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Link to the article "DebugProc function" which states: (DebugProc function) " An application-defined or library-defined callback function used with the SetWindowsHookEx function. Link to an MSDN article called "SetWindowsHookEx function" which then had a Search for "Pinvoke WH_DEBUG" to see what WH_DEBUG means if Pinvoke.Net had it somewhere. Thread which mentioned a WH_DEBUG hook which lead me to this "Detect keyboard hooks" on google and found this But alas I believe you are inaccurate in your assessment as I just searched for Sorry if my English is poor, it's not my first language. I started this thread trying to search for solutions to combat low-level keyboard hooks, which I believe is unfortunately impossible to solve using a high-level programming language such as VB.NET. Although small, there would be still a differenceĪs the keylogger would have to obviously use your bandwidth to upload the captured keystrokes. As for the system not slowing down in the case of spyware, I'd have to object to that. Not sure what you mean about making noise. In this case we need a few, small changes to the above code.I am aware of the existence of keyloggers and that they may be hard to detect. In the above, we assume only one hotkey is needed. Googling "virtual key codes" will get you a list of the codes. The methods are essentially the same, but you will need to retrieve the "virtual key code" of the special key, and use it as a parameter in the Hotkey.registerHotkey method instead of the Asc(triggerKey.toUpper) parameter. Note Hotkeys with special keys such as F1-F12, space and similar requires a slightly different approach.
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Once you have called Hotkey.RegisterHotkey from your code, the hotkey is registered, and will trigger the code in the Hotkey.handleHotKeyEvent, every time the user presses that specific hotkey.
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The above sub captures and sends keyboard messages from the WinAPI to the handleHotKey method in the Hotkey class. WndProc(m) End Sub 'System wide hotkey event handling Protected Overrides Sub WndProc( ByRef m As ) If m.Msg = Hotkey.WM_HOTKEY Then Hotkey.handleHotKeyEvent(m.WParam) End If MyBase. If you for example want to register ALT+Q, you can do the following: To register a hotkey, you need to call the registerHotkey function of the class Hotkey. End Sub Public Shared Sub handleHotKeyEvent( ByVal hotkeyID As IntPtr) MsgBox( "The hotkey was pressed" ) End Sub # End Region End Class # End Region # Region "Hotkey registration, unregistration and handling" Public Shared Sub registerHotkey( ByRef sourceForm As Form, ByVal triggerKey As String, ByVal modifier As KeyModifier) RegisterHotKey(sourceForm.Handle, 1, modifier, Asc(triggerKey.ToUpper)) End Sub Public Shared Sub unregisterHotkeys( ByRef sourceForm As Form) UnregisterHotKey(sourceForm.Handle, 1 ) 'Remember to call unregisterHotkeys() when closing your application. The winAPI functions are used to register / unregister a hotkey ''' Private Declare Function RegisterHotKey Lib "user32" _ ( ByVal hwnd As IntPtr, ByVal id As Integer, ByVal fsModifiers As Integer, ByVal vk As Integer ) As Integer Private Declare Function UnregisterHotKey Lib "user32" ( ByVal hwnd As IntPtr, ByVal id As Integer ) As Integer Public Const WM_HOTKEY As Integer = &H312 Enum KeyModifier None = 0 Alt = &H1 Control = &H2 Shift = &H4 Winkey = &H8 End Enum 'This enum is just to make it easier to call the registerHotKey function: The modifier integer codes are replaced by a friendly "Alt","Shift" etc. Public Class Hotkey # Region "Declarations - WinAPI, Hotkey constant and Modifier Enum" ''' ''' Declaration of winAPI function wrappers.