主题：[求助]EXCEL报表直接打印

Dim Book As New XLS.Book(ProjectPath & "Attachments\订单.xls")
Dim file As String = ProjectPath & "Reports\订单.xls"
Book.Build() '生成细节区
Book.Save(file) '保存工作簿

Dim App As New MSExcel.Application
Dim Wb As MSExcel.WorkBook = App.WorkBooks.Open(file)
Dim Ws As MSExcel.WorkSheet = Wb.WorkSheets(1)
With Ws.PageSetup
    .PaperSize = MSExcel.XlPaperSize.xlPaperA4   '纸张大小
    .CenterHorizontally = True   '页面水平居中
    .CenterVertically = True '页面垂直居中
    .Zoom = False '以下设置将缩印在一页内
    .FitToPagesWide = 1  '按照1页的宽度打印
    .FitToPagesTall = 1  '按照1页的高度打印
End With
App.Visible = True
Ws.PrintPreview
App.Visible=False
wb.save
wb.close
App.Quit

我是要在四联纸上打印（宽：24cm  高14cm）

要如何改红色部分的代码啊？