/// <summary>
/// A callback function which will be called every time a mouse activity detected.
/// </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>
private int MouseHookProc(int nCode, UIntPtr wParam, IntPtr lParam)
{
// if ok and someone listens to our events
if ((nCode >= 0) && (MouseActivity != null))
{
//Marshall the data from callback.
var mouseHookStruct = (MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));
//detect button clicked
var button = MouseButtons.None;
short mouseDelta = 0;
switch ((WM)wParam)
{
case WM.LBUTTONDOWN:
//case WM_LBUTTONUP:
//case WM_LBUTTONDBLCLK:
button = MouseButtons.Left;
break;
case WM.RBUTTONDOWN:
//case WM_RBUTTONUP:
//case WM_RBUTTONDBLCLK:
button = MouseButtons.Right;
break;
case WM.MOUSEWHEEL:
//If the message is WM_MOUSEWHEEL, the high-order word of mouseData member is the wheel delta.
//One wheel click is defined as WHEEL_DELTA, which is 120.
//(value >> 16) & 0xffff; retrieves the high-order word from the specified 32-bit value
mouseDelta = (short)((mouseHookStruct.mouseData >> 16) & 0xffff);
//TODO: X BUTTONS
//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.
break;
}
//double clicks
var clickCount = 0;
if (button != MouseButtons.None)
{
if ((WM)wParam == WM.LBUTTONDBLCLK || (WM)wParam == WM.RBUTTONDBLCLK)
{
clickCount = 2;
}
else
{
clickCount = 1;
}
}
//generate event
var e = new MouseEventArgs(button, clickCount, mouseHookStruct.pt.x, mouseHookStruct.pt.y, mouseDelta);
//raise it
MouseActivity(this, e);
}
//call next hook
return(USER32.CallNextHookEx(hMouseHook, nCode, wParam, lParam));
}
/// <summary>
/// Obtains the cell text of the specified cell
/// </summary>
/// <param name="row"></param>
/// <param name="column"></param>
/// <returns></returns>
public string GetCellText(int row, int column)
{
var lvi = new LVITEM
{
mask = LVIF_TEXT,
cchTextMax = 512,
iItem = row,
iSubItem = column,
pszText = foreignTextBuffer
};
Marshal.StructureToPtr(lvi, localBuffer, false);
//write to foreign process memory
if (!KERNEL32.SafeNativeMethods.WriteProcessMemory(ProcessHandle, foreignItemBuffer, localBuffer, new IntPtr(512), out _))
{
throw new Exception("Could not write to foreign process.");
}
//tell control go give me the content
USER32.SendMessage(ControlHandle, LVM_GETITEM, IntPtr.Zero, foreignItemBuffer);
//read the result
if (!KERNEL32.SafeNativeMethods.ReadProcessMemory(ProcessHandle, foreignTextBuffer, localBuffer, new IntPtr(512), out _))
{
throw new Exception("Could not read from foreign process.");
}
return(Marshal.PtrToStringAuto(localBuffer));
}
/// <summary>
/// Reads the window text of the specified control handle.
/// </summary>
/// <param name="handle"></param>
/// <returns></returns>
public static string GetWindowText(IntPtr handle)
{
var sb = new StringBuilder(64000);
_ = USER32.GetWindowText(handle, sb, sb.Capacity);
KERNEL32.CheckLastError();
return(sb.ToString());
}
/// <summary>
/// The GetClassName function retrieves the name of the class to which the specified window belongs.
/// </summary>
public static string GetClassName(IntPtr hWnd)
{
var size = 1024;
while (true)
{
var stringBuilder = new StringBuilder(size);
var read = USER32.GetClassName(hWnd, stringBuilder, size);
if (read < size)
{
return(stringBuilder.ToString());
}
size *= 2;
}
}
/// <summary>
/// Creates a new SysListView32 instance
/// </summary>
/// <param name="processHandle"></param>
/// <param name="controlHandle"></param>
public SysListView32(IntPtr processHandle, IntPtr controlHandle)
{
var className = USER32.GetClassName(controlHandle);
if (className != "SysListView32")
{
throw new ArgumentException("Control is not a SysListView32");
}
ControlHandle = controlHandle;
_ = USER32.GetWindowThreadProcessId(controlHandle, out ProcessID);
ProcessHandle = processHandle;
foreignTextBuffer = KERNEL32.SafeNativeMethods.VirtualAllocEx(ProcessHandle, IntPtr.Zero, 512, MEM_STATE.ALLOCATE_NEW, MEM_PROTECT.PAGE_READWRITE);
foreignItemBuffer = KERNEL32.SafeNativeMethods.VirtualAllocEx(ProcessHandle, IntPtr.Zero, 512, MEM_STATE.ALLOCATE_NEW, MEM_PROTECT.PAGE_READWRITE);
localBuffer = Marshal.AllocHGlobal(512);
}
/// <summary>
/// Stops monitoring both or one of mouse and/or keyboard events and rasing events.
/// </summary>
/// <param name="throwExceptions"><b>true</b> if exceptions which occured during uninstalling must be thrown</param>
/// <exception cref="Win32ErrorException">Any windows problem.</exception>
public void Stop(bool throwExceptions)
{
Exception resultMouse = null;
Exception resultKeyboard = null;
//if mouse hook set and must be uninstalled
if (hMouseHook != IntPtr.Zero)
{
//uninstall hook
resultMouse = USER32.UnhookWindowsHookEx(hMouseHook) ? null : new Exception("Could not uninstall mouse hook!");
//reset invalid handle
hMouseHook = IntPtr.Zero;
}
//if keyboard hook set and must be uninstalled
if (hKeyboardHook != IntPtr.Zero)
{
//uninstall hook
resultKeyboard = USER32.UnhookWindowsHookEx(hKeyboardHook) ? null : new Exception("Could not uninstall keyboard hook!");
//reset invalid handle
hKeyboardHook = IntPtr.Zero;
//if failed and exception must be thrown
}
//if failed and exception must be thrown
if (throwExceptions && (resultKeyboard != null || resultMouse != null))
{
if (resultKeyboard is null)
{
throw resultMouse;
}
if (resultMouse is null)
{
throw resultKeyboard;
}
throw new AggregateException(resultMouse, resultKeyboard);
}
}
/// <summary>
/// Installs both or one of mouse and/or keyboard hooks and starts rasing events
/// </summary>
/// <exception cref="Win32ErrorException">Any windows problem.</exception>
public void Start()
{
// install Mouse hook only if it is not installed and must be installed
if (hMouseHook == IntPtr.Zero)
{
// Create an instance of HookProc.
mouseHookProcedure = new USER32.HookProc(MouseHookProc);
//install hook
hMouseHook = USER32.SetWindowsHookEx(WH.MOUSE_LL, mouseHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);
//If SetWindowsHookEx fails.
KERNEL32.CheckLastError();
if (hMouseHook == IntPtr.Zero)
{
//do cleanup
Stop(false);
throw new Win32ErrorException();
}
}
// install Keyboard hook only if it is not installed and must be installed
if (hKeyboardHook == IntPtr.Zero)
{
// Create an instance of HookProc.
keyboardHookProcedure = new USER32.HookProc(KeyboardHookProc);
//install hook
hKeyboardHook = USER32.SetWindowsHookEx(WH.KEYBOARD_LL, keyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);
//If SetWindowsHookEx fails.
KERNEL32.CheckLastError();
if (hKeyboardHook == IntPtr.Zero)
{
//do cleanup
Stop(false);
throw new Win32ErrorException();
}
}
}
/// <summary>
/// A callback function which will be called every time a keyboard activity detected.
/// </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>
private int KeyboardHookProc(int nCode, UIntPtr wParam, IntPtr lParam)
{
//indicates if any of underlaing events set e.Handled flag
var handled = false;
//it was ok and someone listens to events
if ((nCode >= 0) && (KeyDown != null || KeyUp != null || KeyPress != null))
{
//read structure KeyboardHookStruct at lParam
var keyboardHookStruct = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure((IntPtr)lParam, typeof(KBDLLHOOKSTRUCT));
//raise KeyDown
if (KeyDown != null && ((WM)wParam == WM.KEYDOWN || (WM)wParam == WM.SYSKEYDOWN))
{
var keyData = (Keys)keyboardHookStruct.vkCode;
var e = new KeyEventArgs(keyData);
KeyDown(this, e);
handled |= e.Handled;
}
// raise KeyPress
if (KeyPress != null && (WM)wParam == WM.KEYDOWN)
{
var isDownShift = ((USER32.GetKeyState((int)VK.SHIFT) & 0x80) == 0x80);
var isDownCapslock = (USER32.GetKeyState((int)VK.CAPITAL) != 0);
var keyState = new byte[256];
USER32.GetKeyboardState(keyState).ThrowOnError();
var inBuffer = new byte[2];
if (USER32.ToAscii(keyboardHookStruct.vkCode, keyboardHookStruct.scanCode, keyState, inBuffer, keyboardHookStruct.flags) == 1)
{
var key = (char)inBuffer[0];
if ((isDownCapslock ^ isDownShift) && char.IsLetter(key))
{
key = char.ToUpper(key);
}
var e = new KeyPressEventArgs(key);
KeyPress(this, e);
handled |= e.Handled;
}
}
// raise KeyUp
if (KeyUp != null && ((WM)wParam == WM.KEYUP || (WM)wParam == WM.SYSKEYUP))
{
var keyData = (Keys)keyboardHookStruct.vkCode;
var e = new KeyEventArgs(keyData);
KeyUp(this, e);
handled |= e.Handled;
}
}
//if event handled in application do not handoff to other listeners
if (handled)
{
return(1);
}
else
{
return(USER32.CallNextHookEx(hKeyboardHook, nCode, wParam, lParam));
}
}
