如何在单元格区域中加粗所有特定单词？

Sub FindAndBold()
'Updateby Extendoffice 20160711
    Dim xFind As String
    Dim xCell As Range
    Dim xTxtRg As Range
    Dim xCount As Long
    Dim xLen As Integer
    Dim xStart As Integer
    Dim xRg As Range
    Dim xTxt As String
    On Error Resume Next
    If ActiveWindow.RangeSelection.Count > 1 Then
      xTxt = ActiveWindow.RangeSelection.AddressLocal
    Else
      xTxt = ActiveSheet.UsedRange.AddressLocal
    End If
    Set xRg = Application.InputBox("Please select data range:", "Kutools for Excel", xTxt, , , , , 8)
    If xRg Is Nothing Then Exit Sub
    On Error Resume Next
    Set xTxtRg = Application.Intersect(xRg.SpecialCells(xlCellTypeConstants, xlTextValues), xRg)
    If xTxtRg Is Nothing Then
        MsgBox "There are no cells with text"
        Exit Sub
    End If
    xFind = Trim(Application.InputBox("What do you want to BOLD?", "Kutools for Excel", , , , , , 2))
    If xFind = "" Then
        MsgBox "No text was listed", vbInformation, "Kutools for Excel"
        Exit Sub
    End If
    xLen = Len(xFind)
    For Each xCell In xTxtRg
        xStart = InStr(xCell.Value, xFind)
        Do While xStart > 0
            xCell.Characters(xStart, xLen).Font.Bold = True
            xCount = xCount + 1
            xStart = InStr(xStart + xLen, xCell.Value, xFind)
        Loop
    Next
    If xCount > 0 Then
        MsgBox "number of " & CStr(xCount) & " text be bolded!", vbInformation, "Kutools for Excel"
    Else
        MsgBox "Not find the specific text!", vbInformation, "Kutools for Excel"
    End If
End Sub