excel file read query

hi
i have started a topic on this before but can seem to find the post in my profile.
anyway
i have code that read my excel file here is the code

Code:

---

    Private Sub btnRead_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRead.Click
        If Not String.IsNullOrEmpty(txtFileName.Text) Then
            Try
                btnClose.Enabled = False
                Dim OExcelHandler As New ExcelHandler()
                Dim ds As DataSet = OExcelHandler.GetDataFromExcel(txtFileName.Text.Trim())

                If ds IsNot Nothing Then
                    dgvExcelData.SelectionMode = DataGridViewSelectionMode.FullRowSelect
                    dgvExcelData.EditMode = DataGridViewEditMode.EditProgrammatically
                    dgvExcelData.DataSource = ds.Tables(0)
                End If
             
            Catch ex As Exception

            Finally
                btnClose.Enabled = True
            End Try
        End If
    End Sub

---

how do i get that code to read a certain worksheet in my workbook. at the moment the code steps through each tab which is fine but i need to get it to look at certain tabs when i click on my radio button and find certain words in the worksheet

anyone and ideas

like im trying it this way but getting an error

Code:

---

  Private Sub RadioButton1_CheckedChanged(sender As Object, e As EventArgs) Handles RadioButton1.CheckedChanged
        If Not String.IsNullOrEmpty(txtFileName.Text) Then
            Try
                btnClose.Enabled = False
                Dim OExcelHandler As New ExcelHandler()
                Dim ds As DataSet = OExcelHandler.GetDataFromExcel(txtFileName.Text.Trim())

                Dim currentFind As Excel.Range = Nothing
                Dim firstFind As Excel.Range = Nothing

                Dim Fruits As Excel.Range = Me.Application.Range("A1", "a500")
                ' You should specify all these parameters every time you call this method, 
                ' since they can be overridden in the user interface.
                currentFind = Fruits.Find("Cash at Bank", , _
                    Excel.XlFindLookIn.xlValues, Excel.XlLookAt.xlPart, _
                    Excel.XlSearchOrder.xlByRows, Excel.XlSearchDirection.xlNext, False)

                While Not currentFind Is Nothing

                    ' Keep track of the first range you find.
                    If firstFind Is Nothing Then
                        firstFind = currentFind

                        ' If you didn't move to a new range, you are done.
                    ElseIf currentFind.Address = firstFind.Address Then
                        Exit While
                    End If

                    With currentFind.Font
                        .Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.Red)
                        .Bold = True
                    End With

                    currentFind = Fruits.FindNext(currentFind)
                End While



            Catch ex As Exception

            Finally
                btnClose.Enabled = True
            End Try
        End If


    End Sub

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You might explain things like;

What is "ExcelHandler", "GetDataFromExcel" etc. There are way to many unknowns in your code to provide suggestions. Lastly, when there is an error as you have mentioned it would be wise to indicate exactly what the errror message is.