How close an open Excel file with code

An expert helped me figure out how to run a routine yesterday via the following code.  But the Excel file opens and displays.  But I want to close the Excel file right after it opens programmatically.

What do I have to add to the code to do this?

Public Sub FieldsToColumns()
'Created by Helen Feddema 30-Jul-2014
'Last modified by Helen Feddema 12-Aug-2014

On Error GoTo ErrorHandler

   Dim appExcel As New Excel.Application
   Dim wkb As Excel.Workbook
   Dim rst As DAO.Recordset
   Dim fld As DAO.Field
   Dim intFieldCount As Integer
   Dim intCount As Integer
   Dim strFieldName As String
   Dim varFieldValue As Variant
   Dim sht As Excel.Worksheet
   Dim intRow As Integer
   Dim strRange As String
   Dim rng As Excel.Range
   Dim strXLFile As String
   
   Set rst = CurrentDb.OpenRecordset("LOCALtblTEMPIHMGNotes")
   intFieldCount = rst.Fields.Count
   Debug.Print "No. of Fields: " & intFieldCount
   Set wkb = appExcel.Workbooks.Add
   Set sht = wkb.Sheets(1)
   intRow = 1
   
   For intCount = 0 To intFieldCount - 1
      strFieldName = rst.Fields(intCount).Name
      Debug.Print "Field name: " & strFieldName
      strRange = "A" & CStr(intRow)
      Set rng = sht.Range(strRange)
      rng.Value = strFieldName
      varFieldValue = rst.Fields(intCount)
      Debug.Print "Field value: " & varFieldValue
      strRange = "B" & CStr(intRow)
      Set rng = sht.Range(strRange)
      rng.Value = varFieldValue
      intRow = intRow + 1
   Next intCount
   
   strXLFile = Environ("userprofile") & "\Desktop\IHMG Notes.xlsx"
   
   wkb.SaveAs FileName:=strXLFile
   appExcel.Visible = True
   
ErrorHandlerExit:
   Set appExcel = Nothing
   Exit Sub

ErrorHandler:
   MsgBox "Error No: " & Err.Number _
      & " in FieldsToColumns procedure; " _
      & "Description: " & Err.Description
   Resume ErrorHandlerExit

End Sub

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--Steve