using System.Runtime.InteropServices; using System.Windows.Forms; using System.ComponentModel;
{
/// <summary>
/// This class allows you to tap keyboard and mouse and / or to detect their activity even when an
/// application runes in background or does not have any user interface at all. This class raises
/// common .NET events with KeyEventArgs and MouseEventArgs so you can easily retrive any information you need.
/// </summary>
{
#region Windows structure definitions
/// <summary>
/// The POINT structure defines the x- and y- coordinates of a point.
/// </summary>
/// <remarks>
/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/rectangl_0tiq.asp
/// </remarks>
[StructLayout(LayoutKind.Sequential)]
{
/// <summary>
/// Specifies the x-coordinate of the point.
/// </summary>
/// <summary>
/// Specifies the y-coordinate of the point.
/// </summary>
}
/// <summary>
/// The MOUSEHOOKSTRUCT structure contains information about a mouse event passed to a WH_MOUSE hook procedure, MouseProc.
/// </summary>
/// <remarks>
/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookstructures/cwpstruct.asp
/// </remarks>
[StructLayout(LayoutKind.Sequential)]
{
/// <summary>
/// Specifies a POINT structure that contains the x- and y-coordinates of the cursor, in screen coordinates.
/// </summary>
/// <summary>
/// Handle to the window that will receive the mouse message corresponding to the mouse event.
/// </summary>
/// <summary>
/// Specifies the hit-test value. For a list of hit-test values, see the description of the WM_NCHITTEST message.
/// </summary>
/// <summary>
/// Specifies extra information associated with the message.
/// </summary>
}
/// <summary>
/// The MSLLHOOKSTRUCT structure contains information about a low-level keyboard input event.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
{
/// <summary>
/// Specifies a POINT structure that contains the x- and y-coordinates of the cursor, in screen coordinates.
/// </summary>
/// <summary>
/// If the message is WM_MOUSEWHEEL, the high-order word of this member is the wheel delta.
/// The low-order word is reserved. A positive value indicates that the wheel was rotated forward,
/// away from the user; a negative value indicates that the wheel was rotated backward, toward the user.
/// One wheel click is defined as WHEEL_DELTA, which is 120.
///If the message is WM_XBUTTONDOWN, WM_XBUTTONUP, WM_XBUTTONDBLCLK, WM_NCXBUTTONDOWN, WM_NCXBUTTONUP,
/// or WM_NCXBUTTONDBLCLK, the high-order word specifies which X button was pressed or released,
/// and the low-order word is reserved. This value can be one or more of the following values. Otherwise, mouseData is not used.
///XBUTTON1
///The first X button was pressed or released.
///XBUTTON2
///The second X button was pressed or released.
/// </summary>
/// <summary>
/// Specifies the event-injected flag. An application can use the following value to test the mouse flags. Value Purpose
///LLMHF_INJECTED Test the event-injected flag.
///0
///Specifies whether the event was injected. The value is 1 if the event was injected; otherwise, it is 0.
///1-15
///Reserved.
/// </summary>
/// <summary>
/// Specifies the time stamp for this message.
/// </summary>
/// <summary>
/// Specifies extra information associated with the message.
/// </summary>
}
/// <summary>
/// The KBDLLHOOKSTRUCT structure contains information about a low-level keyboard input event.
/// </summary>
/// <remarks>
/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookstructures/cwpstruct.asp
/// </remarks>
[StructLayout(LayoutKind.Sequential)]
{
/// <summary>
/// Specifies a virtual-key code. The code must be a value in the range 1 to 254.
/// </summary>
/// <summary>
/// Specifies a hardware scan code for the key.
/// </summary>
/// <summary>
/// Specifies the extended-key flag, event-injected flag, context code, and transition-state flag.
/// </summary>
/// <summary>
/// Specifies the time stamp for this message.
/// </summary>
/// <summary>
/// Specifies extra information associated with the message.
/// </summary>
}
#endregion
#region Windows function imports
/// <summary>
/// The SetWindowsHookEx function installs an application-defined hook procedure into a hook chain.
/// You would install a hook procedure to monitor the system for certain types of events. These events
/// are associated either with a specific thread or with all threads in the same desktop as the calling thread.
/// </summary>
/// <param name="idHook">
/// [in] Specifies the type of hook procedure to be installed. This parameter can be one of the following values.
/// </param>
/// <param name="lpfn">
/// [in] Pointer to the hook procedure. If the dwThreadId parameter is zero or specifies the identifier of a
/// thread created by a different process, the lpfn parameter must point to a hook procedure in a dynamic-link
/// library (DLL). Otherwise, lpfn can point to a hook procedure in the code associated with the current process.
/// </param>
/// <param name="hMod">
/// [in] Handle to the DLL containing the hook procedure pointed to by the lpfn parameter.
/// The hMod parameter must be set to NULL if the dwThreadId parameter specifies a thread created by
/// the current process and if the hook procedure is within the code associated with the current process.
/// </param>
/// <param name="dwThreadId">
/// [in] Specifies the identifier of the thread with which the hook procedure is to be associated.
/// If this parameter is zero, the hook procedure is associated with all existing threads running in the
/// same desktop as the calling thread.
/// </param>
/// <returns>
/// If the function succeeds, the return value is the handle to the hook procedure.
/// If the function fails, the return value is NULL. To get extended error information, call GetLastError.
/// </returns>
/// <remarks>
/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/setwindowshookex.asp
/// </remarks>
[DllImport("user32.dll", CharSet = CharSet.Auto,
CallingConvention
= CallingConvention
.StdCall, SetLastError
= true)] HookProc lpfn,
IntPtr hMod,
/// <summary>
/// The UnhookWindowsHookEx function removes a hook procedure installed in a hook chain by the SetWindowsHookEx function.
/// </summary>
/// <param name="idHook">
/// [in] Handle to the hook to be removed. This parameter is a hook handle obtained by a previous call to SetWindowsHookEx.
/// </param>
/// <returns>
/// If the function succeeds, the return value is nonzero.
/// If the function fails, the return value is zero. To get extended error information, call GetLastError.
/// </returns>
/// <remarks>
/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/setwindowshookex.asp
/// </remarks>
[DllImport("user32.dll", CharSet = CharSet.Auto,
CallingConvention
= CallingConvention
.StdCall, SetLastError
= true)]
/// <summary>
/// The CallNextHookEx function passes the hook information to the next hook procedure in the current hook chain.
/// A hook procedure can call this function either before or after processing the hook information.
/// </summary>
/// <param name="idHook">Ignored.</param>
/// <param name="nCode">
/// [in] Specifies the hook code passed to the current hook procedure.
/// The next hook procedure uses this code to determine how to process the hook information.
/// </param>
/// <param name="wParam">
/// [in] Specifies the wParam value passed to the current hook procedure.
/// The meaning of this parameter depends on the type of hook associated with the current hook chain.
/// </param>
/// <param name="lParam">
/// [in] Specifies the lParam value passed to the current hook procedure.
/// The meaning of this parameter depends on the type of hook associated with the current hook chain.
/// </param>
/// <returns>
/// This value is returned by the next hook procedure in the chain.
/// The current hook procedure must also return this value. The meaning of the return value depends on the hook type.
/// For more information, see the descriptions of the individual hook procedures.
/// </returns>
/// <remarks>
/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/setwindowshookex.asp
/// </remarks>
[DllImport("user32.dll", CharSet = CharSet.Auto,
CallingConvention = CallingConvention.StdCall)]
IntPtr lParam);
/// <summary>
/// The CallWndProc hook procedure is an application-defined or library-defined callback
/// function used with the SetWindowsHookEx function. The HOOKPROC type defines a pointer
/// to this callback function. CallWndProc is a placeholder for the application-defined
/// or library-defined function name.
/// </summary>
/// <param name="nCode">
/// [in] Specifies whether the hook procedure must process the message.
/// If nCode is HC_ACTION, the hook procedure must process the message.
/// If nCode is less than zero, the hook procedure must pass the message to the
/// CallNextHookEx function without further processing and must return the
/// value returned by CallNextHookEx.
/// </param>
/// <param name="wParam">
/// [in] Specifies whether the message was sent by the current thread.
/// If the message was sent by the current thread, it is nonzero; otherwise, it is zero.
/// </param>
/// <param name="lParam">
/// [in] Pointer to a CWPSTRUCT structure that contains details about the message.
/// </param>
/// <returns>
/// If nCode is less than zero, the hook procedure must return the value returned by CallNextHookEx.
/// If nCode is greater than or equal to zero, it is highly recommended that you call CallNextHookEx
/// and return the value it returns; otherwise, other applications that have installed WH_CALLWNDPROC
/// hooks will not receive hook notifications and may behave incorrectly as a result. If the hook
/// procedure does not call CallNextHookEx, the return value should be zero.
/// </returns>
/// <remarks>
/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/callwndproc.asp
/// </remarks>
/// <summary>
/// The ToAscii function translates the specified virtual-key code and keyboard
/// state to the corresponding character or characters. The function translates the code
/// using the input language and physical keyboard layout identified by the keyboard layout handle.
/// </summary>
/// <param name="uVirtKey">
/// [in] Specifies the virtual-key code to be translated.
/// </param>
/// <param name="uScanCode">
/// [in] Specifies the hardware scan code of the key to be translated.
/// The high-order bit of this value is set if the key is up (not pressed).
/// </param>
/// <param name="lpbKeyState">
/// [in] Pointer to a 256-byte array that contains the current keyboard state.
/// Each element (byte) in the array contains the state of one key.
/// If the high-order bit of a byte is set, the key is down (pressed).
/// The low bit, if set, indicates that the key is toggled on. In this function,
/// only the toggle bit of the CAPS LOCK key is relevant. The toggle state
/// of the NUM LOCK and SCROLL LOCK keys is ignored.
/// </param>
/// <param name="lpwTransKey">
/// [out] Pointer to the buffer that receives the translated character or characters.
/// </param>
/// <param name="fuState">
/// [in] Specifies whether a menu is active. This parameter must be 1 if a menu is active, or 0 otherwise.
/// </param>
/// <returns>
/// If the specified key is a dead key, the return value is negative. Otherwise, it is one of the following values.
/// Value Meaning
/// 0 The specified virtual key has no translation for the current state of the keyboard.
/// 1 One character was copied to the buffer.
/// 2 Two characters were copied to the buffer. This usually happens when a dead-key character
/// (accent or diacritic) stored in the keyboard layout cannot be composed with the specified
/// virtual key to form a single character.
/// </returns>
/// <remarks>
/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/toascii.asp
/// </remarks>
[DllImport("user32")]
/// <summary>
/// The GetKeyboardState function copies the status of the 256 virtual keys to the
/// specified buffer.
/// </summary>
/// <param name="pbKeyState">
/// [in] Pointer to a 256-byte array that contains keyboard key states.
/// </param>
/// <returns>
/// If the function succeeds, the return value is nonzero.
/// If the function fails, the return value is zero. To get extended error information, call GetLastError.
/// </returns>
/// <remarks>
/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/toascii.asp
/// </remarks>
[DllImport("user32")]
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
#endregion
#region Windows constants
//values from Winuser.h in Microsoft SDK.
/// <summary>
/// Windows NT/2000/XP: Installs a hook procedure that monitors low-level mouse input events.
/// </summary>
/// <summary>
/// Windows NT/2000/XP: Installs a hook procedure that monitors low-level keyboard input events.
/// </summary>
/// <summary>
/// Installs a hook procedure that monitors mouse messages. For more information, see the MouseProc hook procedure.
/// </summary>
/// <summary>
/// Installs a hook procedure that monitors keystroke messages. For more information, see the KeyboardProc hook procedure.
/// </summary>
/// <summary>
/// The WM_MOUSEMOVE message is posted to a window when the cursor moves.
/// </summary>
/// <summary>
/// The WM_LBUTTONDOWN message is posted when the user presses the left mouse button
/// </summary>
/// <summary>
/// The WM_RBUTTONDOWN message is posted when the user presses the right mouse button
/// </summary>
/// <summary>
/// The WM_MBUTTONDOWN message is posted when the user presses the middle mouse button
/// </summary>
/// <summary>
/// The WM_LBUTTONUP message is posted when the user releases the left mouse button
/// </summary>
/// <summary>
/// The WM_RBUTTONUP message is posted when the user releases the right mouse button
/// </summary>
/// <summary>
/// The WM_MBUTTONUP message is posted when the user releases the middle mouse button
/// </summary>
/// <summary>
/// The WM_LBUTTONDBLCLK message is posted when the user double-clicks the left mouse button
/// </summary>
/// <summary>
/// The WM_RBUTTONDBLCLK message is posted when the user double-clicks the right mouse button
/// </summary>
/// <summary>
/// The WM_RBUTTONDOWN message is posted when the user presses the right mouse button
/// </summary>
/// <summary>
/// The WM_MOUSEWHEEL message is posted when the user presses the mouse wheel.
/// </summary>
/// <summary>
/// The WM_KEYDOWN message is posted to the window with the keyboard focus when a nonsystem
/// key is pressed. A nonsystem key is a key that is pressed when the ALT key is not pressed.
/// </summary>
/// <summary>
/// The WM_KEYUP message is posted to the window with the keyboard focus when a nonsystem
/// key is released. A nonsystem key is a key that is pressed when the ALT key is not pressed,
/// or a keyboard key that is pressed when a window has the keyboard focus.
/// </summary>
/// <summary>
/// The WM_SYSKEYDOWN message is posted to the window with the keyboard focus when the user
/// presses the F10 key (which activates the menu bar) or holds down the ALT key and then
/// presses another key. It also occurs when no window currently has the keyboard focus;
/// in this case, the WM_SYSKEYDOWN message is sent to the active window. The window that
/// receives the message can distinguish between these two contexts by checking the context
/// code in the lParam parameter.
/// </summary>
/// <summary>
/// The WM_SYSKEYUP message is posted to the window with the keyboard focus when the user
/// releases a key that was pressed while the ALT key was held down. It also occurs when no
/// window currently has the keyboard focus; in this case, the WM_SYSKEYUP message is sent
/// to the active window. The window that receives the message can distinguish between
/// these two contexts by checking the context code in the lParam parameter.
/// </summary>
#endregion
/// <summary>
/// Creates an instance of UserActivityHook object and sets mouse and keyboard hooks.
/// </summary>
/// <exception cref="Win32Exception">Any windows problem.</exception>
{
Start();
}
/// <summary>
/// Creates an instance of UserActivityHook object and installs both or one of mouse and/or keyboard hooks and starts rasing events
/// </summary>
/// <param name="InstallMouseHook"><b>true</b> if mouse events must be monitored</param>
/// <param name="InstallKeyboardHook"><b>true</b> if keyboard events must be monitored</param>
/// <exception cref="Win32Exception">Any windows problem.</exception>
/// <remarks>
/// To create an instance without installing hooks call new UserActivityHook(false, false)
/// </remarks>
public UserActivityHook
(bool InstallMouseHook,
bool InstallKeyboardHook
) {
Start(InstallMouseHook, InstallKeyboardHook);
}
/// <summary>
/// Destruction.
/// </summary>
~UserActivityHook()
{
//uninstall hooks and do not throw exceptions
}
/// <summary>
/// Occurs when the user moves the mouse, presses any mouse button or scrolls the wheel
/// </summary>
/// <summary>
/// Occurs when the user presses a key
/// </summary>
/// <summary>
/// Occurs when the user presses and releases
/// </summary>
/// <summary>
/// Occurs when the user releases a key
/// </summary>
/// <summary>
/// Stores the handle to the mouse hook procedure.
/// </summary>
/// <summary>
/// Stores the handle to the keyboard hook procedure.
/// </summary>
/// <summary>
/// Declare MouseHookProcedure as HookProc type.
/// </summary>
/// <summary>
/// Declare KeyboardHookProcedure as HookProc type.
/// </summary>
/// <summary>
/// Installs both mouse and keyboard hooks and starts rasing events
/// </summary>
/// <exception cref="Win32Exception">Any windows problem.</exception>
{
}