private IntPtr OnClipboardUpdate(IntPtr hWnd, uint messageId, IntPtr wParam, IntPtr lParam)
{
if (messageId == (int)GlobalHook.MessageType.WM_CLIPBOARDUPDATE)
{
ClipboardUpdated?.Invoke(hWnd, messageId, wParam, lParam);
}
return(NativeClipboard.DefWindowProc(hWnd, messageId, wParam, lParam));
}
private void Dispose(bool disposing)
{
if (isDisposed || !disposing)
{
return;
}
isDisposed = true;
NativeClipboard.RemoveClipboardFormatListener(WindowHandle);
NativeClipboard.DestroyWindow(WindowHandle);
internalWindowMessageHandler = null;
}
public ClipboardWindowMessageSink()
{
var className = $"sink@{Guid.NewGuid()}";
internalWindowMessageHandler = OnClipboardUpdate;
INativeClipboard.WindowClass windowClass;
windowClass.style = 0;
windowClass.lpfnWndProc = internalWindowMessageHandler;
windowClass.cbClsExtra = 0;
windowClass.cbWndExtra = 0;
windowClass.hInstance = IntPtr.Zero;
windowClass.hIcon = IntPtr.Zero;
windowClass.hCursor = IntPtr.Zero;
windowClass.hbrBackground = IntPtr.Zero;
windowClass.lpszMenuName = "";
windowClass.lpszClassName = className;
NativeClipboard.RegisterClass(ref windowClass);
// Creates window to register clipboard update messages
WindowHandle = NativeClipboard.CreateWindowEx(0,
className,
"",
0,
0, 0,
1, 1,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero);
NativeClipboard.AddClipboardFormatListener(WindowHandle);
}