/// <summary>
/// Serializes the events
/// </summary>
/// <param name="eventClass">Event class</param>
/// <param name="type">Type of event</param>
/// <param name="args">KeyHookEventArgs or MouseHookEventArgs object</param>
/// <param name="pressedKeys">Upto 3 consecutively pressed keys</param>
/// <param name="pressedChar">Pressed character</param>
/// <returns>Data bytes</returns>
public static byte[] GetEncodedData(EventClass eventClass, EventType type, HookEventArgs args, int[] pressedKeys = null, char pressedChar = '\0')
{
byte[] data = null;
using (MemoryStream ms = new MemoryStream())
{
ms.WriteByte(GetHeaderByte(eventClass, type, args));
if (eventClass == EventClass.MouseEvent)
{
MouseHookEventArgs me = args as MouseHookEventArgs;
ms.Write(BitConverter.GetBytes((ushort)me.Location.X), 0, 2);
ms.Write(BitConverter.GetBytes((ushort)me.Location.Y), 0, 2);
//ms.WriteByte((byte)me.Location.X);
//ms.WriteByte((byte)me.Location.Y);
//System.Windows.Forms.MouseButtons.Right;
ms.WriteByte((byte)((int)me.Button >> 20));
byte extra = 0;
switch (type)
{
case EventType.MouseClick:
case EventType.MouseDoubleClick:
extra = (byte)me.ClickCount;
break;
case EventType.MouseWheel:
extra = (byte)Math.Abs(me.ScrollAmount);
if (me.ScrollAmount < 0)
{
extra |= 0x80;
}
break;
}
ms.WriteByte(extra);
}
else
{
KeyHookEventArgs ke = args as KeyHookEventArgs;
byte[] pKeys = { 0, 0, 0 };
if (pressedKeys == null || pressedKeys.Length == 0)
{
throw new ArgumentException("Atleast one key should be in pressed keys.");
}
int len = Math.Min(3, pressedKeys.Length);
for (int i = 0; i < len; i++)
{
pKeys[i] = (byte)pressedKeys[i];
}
ms.Write(pKeys, 0, 3);
ms.WriteByte((byte)pressedChar);
}
data = ms.ToArray();
}
return(data);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="args">Original KeyHookEventArgs object</param>
/// <param name="type">Type of event</param>
/// <param name="pressedKeys">List of keys pressed simultaneously</param>
/// <param name="pressedChar">Key chracter pressed</param>
public KeyHookEventArgsEx(KeyHookEventArgs args, HookEventCodec.EventType type, List <System.Windows.Forms.Keys> pressedKeys, char pressedChar)
: base((uint)args.KeyValue, pressedChar, args.Injected, args.Alt, args.Control, args.Shift, args.CapsLock, args.NumLock, args.ScrollLock)
{
this._type = type;
if (pressedKeys == null)
{
this._pressedKeys = new List <System.Windows.Forms.Keys>();
}
else
{
this._pressedKeys = pressedKeys;
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="args">Original KeyHookEventArgs object</param>
/// <param name="type">Type of event</param>
/// <param name="pressedKeys">List of keys pressed simultaneously</param>
/// <param name="pressedChar">Key chracter pressed</param>
public KeyHookEventArgsEx(KeyHookEventArgs args, HookEventCodec.EventType type, List<System.Windows.Forms.Keys> pressedKeys, char pressedChar)
: base((uint)args.KeyValue, pressedChar, args.Injected, args.Alt, args.Control, args.Shift, args.CapsLock, args.NumLock, args.ScrollLock)
{
this._type = type;
if (pressedKeys == null)
this._pressedKeys = new List<System.Windows.Forms.Keys>();
else
this._pressedKeys = pressedKeys;
}
public static bool GetDecodedData(int offset, byte[] data, out EventClass eventClass, out EventType type, out HookArgs args, out byte[] pressedKeys, out char pressedChar)
{
using (MemoryStream ms = new MemoryStream(data))
{
// Set Offset
ms.Position = offset;
// Assign
pressedKeys = null;
pressedChar = '\0';
eventClass = EventClass.None;
type = EventType.None;
args = null;
// Check
if (ms.Position < ms.Length)
{
FromHeaderByte((byte)ms.ReadByte(), out eventClass, out type, out args);
pressedKeys = new byte[3] { 0, 0, 0 };
if (eventClass == EventClass.MouseEvent)
{
//int x = ms.ReadByte();
//int y = ms.ReadByte();
byte[] loc = new byte[2];
ms.Read(loc, 0, 2);
int x = BitConverter.ToInt16(loc, 0);
ms.Read(loc, 0, 2);
int y = BitConverter.ToInt16(loc, 0);
System.Windows.Forms.MouseButtons button = System.Windows.Forms.MouseButtons.None;
switch(ms.ReadByte())
{
case 1:
button = System.Windows.Forms.MouseButtons.Left;
break;
case 2:
button = System.Windows.Forms.MouseButtons.Right;
break;
case 4:
button = System.Windows.Forms.MouseButtons.Middle;
break;
case 8:
button = System.Windows.Forms.MouseButtons.XButton1;
break;
case 16:
button = System.Windows.Forms.MouseButtons.XButton2;
break;
}
int extra = ms.ReadByte();
int click = 0;
int scroll = 0;
switch (type)
{
case EventType.MouseClick:
case EventType.MouseDblClick:
click = extra;
break;
case EventType.MouseWheel:
if ((extra & 0x80) == 0x80)
scroll = -1;
else
scroll = 1;
extra &= 0x7F;
scroll = scroll * extra * 120; //Delta
break;
}
args = new MouseHookEventArgs(false, button, click, x, y, scroll, args.Alt, args.Control, args.Shift, args.CapsLock, args.NumLock, args.ScrollLock);
}
else
{
ms.Read(pressedKeys, 0, 3);
pressedChar = (char)ms.ReadByte();
args = new KeyHookEventArgs(pressedKeys[0], pressedChar, false, args.Alt, args.Control, args.Shift, args.CapsLock, args.NumLock, args.ScrollLock);
}
return true;
}
}
return false;
}
/// <summary>
/// Callback for LL Keyboard Hook
/// </summary>
private IntPtr KeyboardCallback(int code, IntPtr wParam, IntPtr lParam)
{
if (code < 0)
{
return(USER32.CallNextHookEx(IntPtr.Zero, code, wParam, lParam));
}
// Else Process
bool handled = false;
USER32.KBDLLHOOKSTRUCT kbd = (USER32.KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(USER32.KBDLLHOOKSTRUCT));
int wP = wParam.ToInt32();
bool isInjected = kbd.flags == USER32.KBDLLHOOKSTRUCTFlags.LLKHF_INJECTED;
bool isDownAlt = ((USER32.GetKeyState((uint)VirtualKey.VK_MENU) & 0x80) == 0x80 ? true : false);
bool isDownCtrl = ((USER32.GetKeyState((uint)VirtualKey.VK_CONTROL) & 0x80) == 0x80 ? true : false);
bool isDownShift = ((USER32.GetKeyState((uint)VirtualKey.VK_SHIFT) & 0x80) == 0x80 ? true : false);
bool isDownCapslock = (USER32.GetKeyState((uint)VirtualKey.VK_CAPITAL) != 0 ? true : false);
bool isDownNumlock = (USER32.GetKeyState((uint)VirtualKey.VK_NUMLOCK) != 0 ? true : false);
bool isDownScrolllock = (USER32.GetKeyState((uint)VirtualKey.VK_SCROLL) != 0 ? true : false);
// If Key Down
if (this.KeyDown != null && (wP == (int)WM.SYSKEYDOWN || wP == (int)WM.KEYDOWN))
{
KeyHookEventArgs e = new KeyHookEventArgs(kbd.vkCode, isInjected, isDownAlt, isDownCtrl, isDownShift, isDownCapslock, isDownNumlock, isDownScrolllock);
this.KeyDown.Invoke(e);
handled = e.Handled;
}
// Key Press
if (this.KeyPressed != null && wP == (int)WM.KEYDOWN)
{
byte[] keyState = new byte[256];
USER32.GetKeyboardState(keyState);
byte[] inBuffer = new byte[2];
if (USER32.ToAscii(kbd.vkCode, kbd.scanCode, keyState, inBuffer, (uint)kbd.flags) == 1)
{
char key = (char)inBuffer[0];
if ((isDownCapslock ^ isDownShift) && Char.IsLetter(key))
{
key = Char.ToUpper(key);
}
KeyHookEventArgs e = new KeyHookEventArgs(kbd.vkCode, key, isInjected, isDownAlt, isDownCtrl, isDownShift, isDownCapslock, isDownNumlock, isDownScrolllock);
this.KeyPressed.Invoke(e);
handled = handled || e.Handled;
}
}
// Key Up
if (this.KeyUp != null && (wP == (int)WM.SYSKEYUP || wP == (int)WM.KEYUP))
{
Keys keyData = (Keys)kbd.vkCode;
KeyHookEventArgs e = new KeyHookEventArgs(kbd.vkCode, isInjected, isDownAlt, isDownCtrl, isDownShift, isDownCapslock, isDownNumlock, isDownScrolllock);
this.KeyUp.Invoke(e);
handled = handled || e.Handled;
}
if (handled)
{
return(new IntPtr(-1));
}
return(USER32.CallNextHookEx(this.kbdHook, code, wParam, lParam));
}
/// <summary>
/// Deserializes the data bytes
/// </summary>
/// <param name="offset">Starting position in stream</param>
/// <param name="data">Received Data bytes</param>
/// <param name="eventClass">Decoded event class</param>
/// <param name="type">Decoded event type</param>
/// <param name="args">Decoded HookEventArgs</param>
/// <param name="pressedKeys">Upto 3 consecutively pressed decoded keys</param>
/// <param name="pressedChar">Decoded pressed character</param>
/// <returns>True if stream is not empty, else false</returns>
public static bool GetDecodedData(int offset, byte[] data, out EventClass eventClass, out EventType type, out HookEventArgs args, out byte[] pressedKeys, out char pressedChar)
{
using (MemoryStream ms = new MemoryStream(data))
{
// Set Offset
ms.Position = offset;
// Assign
pressedKeys = null;
pressedChar = '\0';
eventClass = EventClass.None;
type = EventType.None;
args = null;
// Check
if (ms.Position < ms.Length)
{
FromHeaderByte((byte)ms.ReadByte(), out eventClass, out type, out args);
pressedKeys = new byte[3] {
0, 0, 0
};
if (eventClass == EventClass.MouseEvent)
{
//int x = ms.ReadByte();
//int y = ms.ReadByte();
byte[] loc = new byte[2];
ms.Read(loc, 0, 2);
int x = BitConverter.ToInt16(loc, 0);
ms.Read(loc, 0, 2);
int y = BitConverter.ToInt16(loc, 0);
System.Windows.Forms.MouseButtons button = System.Windows.Forms.MouseButtons.None;
switch (ms.ReadByte())
{
case 1:
button = System.Windows.Forms.MouseButtons.Left;
break;
case 2:
button = System.Windows.Forms.MouseButtons.Right;
break;
case 4:
button = System.Windows.Forms.MouseButtons.Middle;
break;
case 8:
button = System.Windows.Forms.MouseButtons.XButton1;
break;
case 16:
button = System.Windows.Forms.MouseButtons.XButton2;
break;
}
int extra = ms.ReadByte();
int click = 0;
int scroll = 0;
switch (type)
{
case EventType.MouseClick:
case EventType.MouseDoubleClick:
click = extra;
break;
case EventType.MouseWheel:
if ((extra & 0x80) == 0x80)
{
scroll = -1;
}
else
{
scroll = 1;
}
extra &= 0x7F;
scroll = scroll * extra * 120; //Delta
break;
}
args = new MouseHookEventArgs(false, button, click, x, y, scroll, args.Alt, args.Control, args.Shift, args.CapsLock, args.NumLock, args.ScrollLock);
}
else
{
ms.Read(pressedKeys, 0, 3);
pressedChar = (char)ms.ReadByte();
args = new KeyHookEventArgs(pressedKeys[0], pressedChar, false, args.Alt, args.Control, args.Shift, args.CapsLock, args.NumLock, args.ScrollLock);
}
return(true);
}
}
return(false);
}
