喝水不忘挖井人,之前提问官方没有给出答案，不过帮助里有，搜索论坛发现也有不少和我一样的菜鸟有这样的问题，贴出来分享下代码

\'==========打印机遍历代码,我放在窗口的afterload事件

Dim cmb As WinForm.ComboBox = e.form.Controls("打印机选择")
For Each p As String In InstalledPrinters
    cmb.Items.Add(p)
Next
cmb.Text = GetConfigValue("pntname1","请选择打印机")

\'=================================打印按钮代码

Dim pnt As WinForm.ComboBox = e.Form.Controls("打印机选择")\'取得打印机名称
Dim pntn As String = pnt.Text
SaveConfigValue("pntname1",pntn)

Dim Book As New XLS.Book(ProjectPath & "Attachments\\表格名.xls")
Dim fl As String = ProjectPath & "Reports\\表格名.xls"
Book.Build() \'生成细节区
Book.Save(fl) \'保存工作簿
Dim App As New MSExcel.Application
Dim Wb As MSExcel.WorkBook = App.WorkBooks.Open(fl)
Dim Ws As MSExcel.WorkSheet = Wb.WorkSheets(1)
Ws.PrintOut(ActivePrinter:=pntn)
App.quit \'这个一定要写，退出进程里的EXCEL,否则会提示XXX已经打开

帮助里有写

Ws.PrintOut(From:=1,To:=10,Copies:=3,Preview:=True,ActivePrinter:="pdfFactory Pro")

打印第1-10页，打印份数为3，打印前先预览，指定的打印机为"pdfFactory Pro"

这个跟厂商设定的DLL有关系吧