private int InternalHookProc(int nCode, IntPtr wParam, IntPtr lParam)
{
var vkcode = System.Runtime.InteropServices.Marshal.ReadByte(lParam, 0);
// pass control to our hook procedure, if enabled we wont pass message to windows
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms644985(v=vs.85).aspx specifies we must pass message on without processing if nCode < 0
// let scroll lock through so can toggle Enabled
if (nCode >= 0 && vkcode != 0x91 && Program.Enabled)
{
var keyState = (KeyState)wParam;
var keyEvent = new KeyEvent()
{
vkCode = vkcode,
scanCode = System.Runtime.InteropServices.Marshal.ReadByte(lParam, 1),
flags = System.Runtime.InteropServices.Marshal.ReadByte(lParam, 2),
time = System.Runtime.InteropServices.Marshal.ReadByte(lParam, 3),
dwExtraInfo = System.Runtime.InteropServices.Marshal.ReadIntPtr(lParam, 4)
};
if (KeyboardHookEvent != null)
{
KeyboardHookEvent(keyState, keyEvent);
/* Leaving here incase I care about return values again later *
* foreach (KeyboardHookEventHandler hookProc in KeyboardHookEvent.GetInvocationList())
* hookProc(keyState, keyEvent);
*/
}
return(1);
}
return(User32Dll.CallNextHookEx(idHook, nCode, wParam, lParam));
}
public void Dispose()
{
if (!User32Dll.UnhookWindowsHookEx(idHook))
{
throw new Exception("Windows didnt let us unhook?!");
}
}
public KeyboardHook()
{
idHook = User32Dll.SetWindowsHookEx(WH_KEYBOARD_LL, InternalHookProc, IntPtr.Zero, 0);
}
