jacob 设置横向打印还是纵向打印，这是什么原因？

今天刚用jacob 打印发票，网上说Orientation 设置为2 是横向，我设置了还是纵向打印，0 也试过，也是一样，请教大神

ComThread.InitSTA();
                ActiveXComponent xl = new ActiveXComponent("Excel.Application");
                try {
                    // 不打开文档
                    Dispatch.put(xl, "Visible", new Variant(false));
                    Dispatch workbooks = xl.getProperty("Workbooks").toDispatch();
                    // 打开文档
                    Dispatch excel = Dispatch.call(workbooks, "Open", f.getAbsolutePath()).toDispatch();
                    Dispatch sheets = Dispatch.get((Dispatch) excel, "Sheets").toDispatch();
                    Dispatch sheet = Dispatch
                                .invoke(sheets, "Item", Dispatch.Get, new Object[]{new Integer(sheelIndex+1)}, new int[1])
                                .toDispatch();
                    Dispatch pageSetup = Dispatch.get(sheet, "PageSetup").toDispatch();
                    Dispatch.put(pageSetup, "Orientation", new Variant(2));
                    Dispatch.call(sheet, "PrintOut");
                    // 开始打印
                    if (excel != null) {
                        // Dispatch.call(excel, "PrintOut");
                        // 增加以下三行代码解决文件无法删除bug
                        Dispatch.call(excel, "save");
                        Dispatch.call(excel, "Close", new Variant(true));
                        excel = null;
                    }
                    xl.invoke("Quit", new Variant[]{});
                    xl = null;
                    return true;
                } catch (Exception e) {
                    e.printStackTrace();
                    return false;
                } finally {
                    // 始终释放资源
                    ComThread.Release();
                }

Dispatch.put(pageSetup, "Orientation", new Variant(2));
调试下这里，看pageSetup设置了没有