COMException: OpenClipboard に失敗しました (HRESULT からの例外:0x800401D0 (CLIPBRD_E_CANT_OPEN))
StackTrace:
   場所 System.Runtime.InteropServices.ComTypes.IDataObject.GetData(FORMATETC& format, STGMEDIUM& medium)
   場所 System.Windows.DataObject.OleConverter.GetDataInner(FORMATETC& formatetc, STGMEDIUM& medium)
   場所 System.Windows.DataObject.OleConverter.GetDataFromOleHGLOBAL(String format, DVASPECT aspect, Int32 index)
   場所 System.Windows.DataObject.OleConverter.GetDataFromBoundOleDataObject(String format, DVASPECT aspect, Int32 index)
   場所 System.Windows.DataObject.OleConverter.GetData(String format, Boolean autoConvert, DVASPECT aspect, Int32 index)
   場所 System.Windows.DataObject.OleConverter.GetData(String format, Boolean autoConvert)
   場所 System.Windows.DataObject.GetText(TextDataFormat format)
   場所 IntelliTools.Domain.MyClipboard.TextClipItem.ExtractData(DataObject data)
   場所 IntelliTools.Domain.MyClipboard.HtmlClipItem.ExtractData(DataObject data)
   場所 IntelliTools.Domain.MyClipboard.ClipItemFactory.CreateFromClipboard()
   場所 IntelliTools.View.BackgroundWindow.LasyOnClipboardChanged()
   場所 IntelliTools.View.BackgroundWindow.Timer_Tick(Object sender, EventArgs e)
   場所 System.Windows.Threading.DispatcherTimer.FireTick(Object unused)
   場所 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   場所 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)