/// <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 static int MouseHookProc(int nCode, int wParam, IntPtr lParam)
{
if (nCode >= 0)
{
// marshall the data from callback
MouseLLHookStruct mouseHookStruct = (MouseLLHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseLLHookStruct));
MouseButtons buttonClicked = MouseButtons.None;
bool mouseDown = false;
bool mouseUp = false;
switch (wParam)
{
case WM_LBUTTONDOWN:
mouseDown = true;
buttonClicked = MouseButtons.Left;
break;
case WM_LBUTTONUP:
mouseUp = true;
buttonClicked = MouseButtons.Left;
break;
case WM_RBUTTONDOWN:
mouseDown = true;
buttonClicked = MouseButtons.Right;
break;
case WM_RBUTTONUP:
mouseUp = true;
buttonClicked = MouseButtons.Right;
break;
}
// generate event
MouseEventExtArgs e = new MouseEventExtArgs(buttonClicked, 1, mouseHookStruct.Point.X, mouseHookStruct.Point.Y, 0);
#region Invoke Subscribed Events
if (_mouseUpEvent != null && mouseUp)
_mouseUpEvent.Invoke(null, e);
if (_mouseDownEvent != null && mouseDown)
_mouseDownEvent.Invoke(null, e);
if (_mouseClickEvent != null && buttonClicked != MouseButtons.None)
_mouseClickEvent.Invoke(null, e);
if (_mouseMoveEvent != null && (_oldX != mouseHookStruct.Point.X || _oldY != mouseHookStruct.Point.Y))
{
_oldX = mouseHookStruct.Point.X;
_oldY = mouseHookStruct.Point.Y;
if (_mouseMoveEvent != null)
_mouseMoveEvent.Invoke(null, e);
}
#endregion
// do not call the next hook if we've handle this event
if (e.Handled)
return -1;
}
// call next hook
return CallNextHookEx(_mouseHookHandle, nCode, wParam, lParam);
}
/// <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 static int MouseHookProc(int nCode, int wParam, IntPtr lParam)
{
if (nCode >= 0)
{
// marshall the data from callback
MouseLLHookStruct mouseHookStruct = (MouseLLHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseLLHookStruct));
MouseButtons buttonClicked = MouseButtons.None;
bool mouseDown = false;
bool mouseUp = false;
switch (wParam)
{
case WM_LBUTTONDOWN:
mouseDown = true;
buttonClicked = MouseButtons.Left;
break;
case WM_LBUTTONUP:
mouseUp = true;
buttonClicked = MouseButtons.Left;
break;
case WM_RBUTTONDOWN:
mouseDown = true;
buttonClicked = MouseButtons.Right;
break;
case WM_RBUTTONUP:
mouseUp = true;
buttonClicked = MouseButtons.Right;
break;
}
// generate event
MouseEventExtArgs e = new MouseEventExtArgs(buttonClicked, 1, mouseHookStruct.Point.X, mouseHookStruct.Point.Y, 0);
#region Invoke Subscribed Events
if (_mouseUpEvent != null && mouseUp)
_mouseUpEvent.Invoke(null, e);
if (_mouseDownEvent != null && mouseDown)
_mouseDownEvent.Invoke(null, e);
if (_mouseClickEvent != null && buttonClicked != MouseButtons.None)
_mouseClickEvent.Invoke(null, e);
if (_mouseMoveEvent != null && (_oldX != mouseHookStruct.Point.X || _oldY != mouseHookStruct.Point.Y))
{
_oldX = mouseHookStruct.Point.X;
_oldY = mouseHookStruct.Point.Y;
if (_mouseMoveEvent != null)
_mouseMoveEvent.Invoke(null, e);
}
#endregion
// do not call the next hook if we've handle this event
if (e.Handled)
return -1;
}
// call next hook
return CallNextHookEx(_mouseHookHandle, nCode, wParam, lParam);
}
