求VB.NET对任一excel表格查找替换的代码。

用VB.NET编写代码，要求打开任一Excel表格，对里面的数据进行查找替换。例如将“李明”替换为“王梅梅”。下面的答案看不见了，请其他会的大大帮帮忙。

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'On Error GoTo EXIT_ERROR
Dim strErrorPos As String = "F_TreatOne"
Dim strFileName As String
strFileName = "d:\test.xlsx"
Dim objExcelApp As New Microsoft.Office.Interop.Excel.Application

Dim objWorkBook As Microsoft.Office.Interop.Excel.Workbook

Dim objSheet As Microsoft.Office.Interop.Excel.Worksheet

objWorkBook = objExcelApp.Workbooks.Open(strFileName)
objSheet = objWorkBook.Worksheets(1)
objSheet.UsedRange.Replace("aaa", "bbb")
objWorkBook.Save()
objWorkBook.Close()
objExcelApp.Quit()
objWorkBook = Nothing
objExcelApp = Nothing
End Sub
需要的话,自已再适当修改修改.
项目中需要加对Microsoft.Office.Interop.Excel的引用.