vb.net 通过按钮打开一个本地Excel，实现不了，请指教

Imports Microsoft.VisualBasic.DateAndTime
Imports System.Windows.Forms
Imports System.Data.OleDb
Imports Microsoft.Office.Tools.Excel
Imports Microsoft.Office.Interop.Excel.XlApplicationInternational Imports dao

Public Class Form1
  
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim ex = CreateObject("excel.application")

        Dim exwBook As Excel.Workbook = ex.Workbooks.Open("D:\算工程数量\陈燕平精简表0425.xls")

        Dim exSheet1 = exwBook.Worksheets(1) '按表序
        
    End Sub

End Class