'Declare a BarTender application variable Dim btApp As BarTender.Application 'Declare a BarTender format variable Dim btFormat As New BarTender.Format 'Declare a BarTender messages variable Dim msgs As BarTender.Messages = Nothing 'Instantiate the BarTender application btApp = new BarTender.ApplicationClass 'Open a BarTender label format btFormat = btApp.Formats.Open("c:\Format1.btw") 'Export label format to a print preview Dim res As BarTender.BtPrintResult res = btFormat.ExportPrintPreviewToImage("c:\", "Label_%PageNumber%_Preview.jpg", "jpg", BarTender.BtColors.btColors24Bit, 200, 13117215, BarTender.BtSaveOptions.btSaveChanges, true, true, msgs) 'End the BarTender process btApp.Quit(BarTender.BtSaveOptions.btDoNotSaveChanges)And second question is set the start position when print the BarCode label (A4 format)?