public KeyboardHookEventArgs(
LowLevelKeyboardInputEvent keyboardData,
WindowsKeyboardState keyboardState)
{
KeyboardData = keyboardData;
KeyboardState = keyboardState;
}
public IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam)
{
bool fEatKeyStroke = false;
var wparamTyped = wParam.ToInt32();
if (Enum.IsDefined(typeof(WindowsKeyboardState), wparamTyped))
{
object o = Marshal.PtrToStructure(lParam, typeof(LowLevelKeyboardInputEvent));
LowLevelKeyboardInputEvent p = (LowLevelKeyboardInputEvent)o;
var eventArguments = new KeyboardHookEventArgs(p, (WindowsKeyboardState)wparamTyped);
var scancode = eventArguments.KeyboardData.HardwareScanCode;
var vkey = (VirtualKeys)eventArguments.KeyboardData.VirtualCode;
var flags = eventArguments.KeyboardData.Flags;
var extended = ((flags) & ((int)WindowsKeyFlags.KF_EXTENDED >> 8)) > 0;
var is_valid = true;
Key key = WinKeyMap.TranslateKey(scancode, vkey, extended, false, out is_valid);
if (is_valid)
{
if (eventArguments.KeyboardState == WindowsKeyboardState.KeyDown || eventArguments.KeyboardState == WindowsKeyboardState.SysKeyDown)
{
OnKeyDown(key);
fEatKeyStroke = KeyDownArgs.Handled;
}
if (eventArguments.KeyboardState == WindowsKeyboardState.KeyUp || eventArguments.KeyboardState == WindowsKeyboardState.SysKeyUp)
{
OnKeyUp(key);
fEatKeyStroke = KeyUpArgs.Handled;
}
}
}
return(fEatKeyStroke ? (IntPtr)1 : NativeApi.CallNextHookEx(IntPtr.Zero, nCode, wParam, lParam));
}