Open word document without showing in task bar

Question

I try to use Microsoft Word 10.0 Object Library to open doc file, I not want to display word application on the screen, but it show on the task bar each time . Below is my code,How to fix it? Thanks. Object objFalse = false; Object objTrue = true; object missing = System.Reflection.Missing.Value; object emptyData = String.Empty; Word.Application wordApp = new Word.Application(); Word.Document doc = new Word.Document(); wordApp.Visible = false; wordApp.WindowState = Word.WdWindowState.wdWindowStateMinimize; try { foreach (String fileName in fileNames) { Object objFileName = fileName; doc = wordApp.Documents.Open(ref objFileName, ref objFalse, ref objTrue, ref objFalse, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref objFalse, ref missing, ref missing, ref missing); wordApp.Visible = false; wordApp.WindowState = Word.WdWindowState.wdWindowStateMinimize; doc.ActiveWindow.Selection.WholeStory(); doc.ActiveWindow.Selection.Copy(); IDataObject data = Clipboard.GetDataObject(); this.wordText += data.GetData(DataFormats.Text).ToString(); Clipboard.SetDataObject(String.Empty); } } catch (Exception ex) { MessageBox.Show(ex.Message); } finally { wordApp.Documents.Close(ref objFalse, ref missing, ref missing); wordApp.Application.Quit(ref objFalse, ref missing, ref missing); } }