internal override IntPtr Callback(int nCode, IntPtr wParam, IntPtr lParam)
{
var data = (MSLLHOOKSTRUCT)PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));
var ea = new LowLevelMouseProcEventArgs(data);
LowLevelMouseProc?.Invoke((WPARAM)wParam, ea);
switch ((WPARAM)wParam)
{
case WPARAM.WM_MOUSEMOVE:
MouseMove?.Invoke(ea);
break;
case WPARAM.WM_LBUTTONDOWN:
LButtonDown?.Invoke(ea);
break;
case WPARAM.WM_LBUTTONUP:
LButtonUp?.Invoke(ea);
break;
case WPARAM.WM_RBUTTONDOWN:
RButtonDown?.Invoke(ea);
break;
case WPARAM.WM_RBUTTONUP:
RButtonUp?.Invoke(ea);
break;
case WPARAM.WM_MOUSEWHEEL:
MouseWheel?.Invoke(ea);
break;
case WPARAM.WM_MOUSEHWHEEL:
MouseHWheel?.Invoke(ea);
break;
}
return(base.Callback(nCode, wParam, lParam));
}
/// <summary>
/// The internal hook callback.
/// </summary>
private IntPtr HookCallback(
int nCode, IntPtr wParam, IntPtr lParam)
{
int nmsg = wParam.ToInt32();
WindowMessage msg = (WindowMessage)nmsg;
if (nCode >= 0 &&
(nmsg >= (int)WindowMessage.WM_MOUSEFIRST && nmsg <= (int)WindowMessage.WM_MOUSEWHEEL))
{
try
{
int vkCode = Marshal.ReadInt32(lParam);
Keys key = (Keys)vkCode;
if (!NativeMethods.GetCursorPos(out NativeMethods.POINT pt))
{
throw new Win32Exception();
}
MouseHookEventArgs eventArgs = new MouseHookEventArgs(new Point(pt.X, pt.Y));
switch (msg)
{
case WindowMessage.WM_MOUSEMOVE:
MouseMove?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_LBUTTONDOWN:
LButtonDown?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_LBUTTONUP:
LButtonUp?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_LBUTTONDBLCLK:
LButtonDblClick?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_RBUTTONDOWN:
RButtonDown?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_RBUTTONUP:
RButtonUp?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_RBUTTONDBLCLK:
RButtonDblClick?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_MBUTTONDOWN:
MButtonDown?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_MBUTTONUP:
MButtonUp?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_MBUTTONDBLCLK:
MButtonDblClick?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_XBUTTONDOWN:
XButtonDown?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_XBUTTONUP:
XButtonUp?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_XBUTTONDBLCLK:
XButtonDblClick?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_MOUSEWHEEL:
MouseVWheel?.Invoke(this, eventArgs);
break;
case WindowMessage.WM_MOUSEHWHEEL:
MouseHWheel?.Invoke(this, eventArgs);
break;
}
// If Handled is set to true,
// return 1 and stop the keyboard event
// from propagating to other applications.
if (eventArgs.Handled)
{
return((IntPtr)1);
}
}
catch (Exception e)
{
System.Windows.Application.Current.Dispatcher.InvokeAsync(() =>
{
System.Windows.MessageBox.Show(e.ToString(), "Application Error", System.Windows.MessageBoxButton.OK, System.Windows.MessageBoxImage.Error);
});
}
}
return(NativeMethods.CallNextHookEx(_nativeHookId, nCode, wParam, lParam));
}
