private IntPtr HookCallback(int code, IntPtr wParam, IntPtr lParam)
{
if (code < 0)
{
return(InterceptKeys.CallNextHookEx(_hookId, code, wParam, lParam));
}
const int WM_KEYDOWN = 0x0100;
if (wParam != (IntPtr)WM_KEYDOWN)
{
return(InterceptKeys.CallNextHookEx(_hookId, code, wParam, lParam));
}
var vkCode = Marshal.ReadInt32(lParam);
var keyDownEvent = KeyDown;
if (keyDownEvent != null)
{
keyDownEvent(null, new RawKeyEventArgs(vkCode, false));
}
return(InterceptKeys.CallNextHookEx(_hookId, code, wParam, lParam));
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
InterceptKeys.UnhookWindowsHookEx(_hookId);
}
/// <summary>
/// Initializes static members of the <see cref="GlobalKeyboardHookHelper"/> class.
/// </summary>
public GlobalKeyboardHookHelper()
{
_hookId = InterceptKeys.SetHook(HookCallback);
}
