Create a new Word Document using VSTO

using Word = Microsoft.Office.Interop.Word;

object missing = System.Reflection.Missing.Value;
Word.Application app = new Word.ApplicationClass();
Word.Document doc = app.Documents.Add(ref missing, ref missing, ref missing, ref missing);
doc.Activate();
app.Selection.TypeText("This is some text in my new Word document.");
app.Selection.TypeParagraph();

Globals.ThisAddIn.Application.Documents.Add(ref objTemplate, ref missingType, ref missingType, ref missingType);