visual basic .NET adding new data to the file

[tibits]

Hello ,
I'm just learning to program in visual basic .NET.
I need your help. I have this code:

Private Sub Button8_Click(sender As Object, e As EventArgs) Handles Button8.Click

        Dim xlappFile As Microsoft.Office.Interop.Excel.Application = Nothing
        Dim xlFile_WB As Microsoft.Office.Interop.Excel.Workbook = Nothing
        Dim xlFile_WS As Microsoft.Office.Interop.Excel.Worksheet = Nothing
        Dim xlFirstfile_WS1 As Microsoft.Office.Interop.Excel.Worksheet = Nothing
        Dim FoundRange As Microsoft.Office.Interop.Excel.Range
        Dim searchID As String

        searchID = TextBox15.Text
        xlFile_WB = xlappFile.Workbooks.Open("C:\Users\stich\Desktop\BAZA.xlsx")
        xlFile_WS = xlappFile.Worksheets("pierwszy")
        FoundRange = xlFile_WS.Cells.Find(What:=searchID, LookIn:=Microsoft.Office.Interop.Excel.XlFindLookIn.xlFormulas, LookAt:=Microsoft.Office.Interop.Excel.XlLookAt.xlWhole)

        If FoundRange Is Nothing Then
            MsgBox("nie znaleziono wyrazenia")
        Else
            FoundRange.Offset(0, 2).Value = ComboBox2.Text
        End If
        'zapis bazy danych
        xlFile_WB.Save()
        xlappFile.Quit()

    End Sub

He wants to open the given excel file with a given button and search for the cell containing the text entered in texbox15. After Search for this cell in the appropriate columns, enter the values ​​from the next textboxs.
Who will tell you how to do it?