Microsoft.Office.Interop.Word.Application newApp = new Microsoft.Office.Interop.Word.Application();
            object filename = ".....";
            object missing = System.Reflection.Missing.Value; 
            Microsoft.Office.Interop.Word.Document doc = newApp.Documents.Open(ref filename,ref missing,ref missing,ref missing,ref missing,ref missing,ref missing,ref missing,ref missing,ref missing,ref missing,ref missing,ref missing,ref missing,ref missing,ref missing);         
            int count = doc.InlineShapes.Count;
            for (int i = 0; i < count; i++)
                {
                    if (doc.InlineShapes[i].Type == Microsoft.Office.Interop.Word.WdInlineShapeType.wdInlineShapePicture)
                            {
                                doc.InlineShapes[i].Select();
                                newApp.Selection.Copy();
                                Image image = Clipboard.GetImage();
                                if (image != null)
                                {
                                    Bitmap bitmap = new Bitmap(image);
                                    bitmap.Save(.....);
                                }
                             }
                

                }
            Console.WriteLine("程序运行成功");

这是一段程序用来打开一个word文档并把里面的图片提取出来放到指定的文件夹下，可是程序能编译成功，但是没提取出图片，程序中Image image = Clipboard.GetImage(); 这句返回值总是null ，麻烦谁能指点下