以下是替换字符串中制定字符的函数过程: Function sReplace (SearchLine As String,SearchFor As String,Replace With As String) As String Dim vSearchLine As String,found As Integer found=InStr (SearchLine,SearchFor):vSearchLine=SearchLine If found <>0 Then vSearchLine=" " If found>1 Then vSearchLine=Left (SearchLine,found -1) vSearchLine=vSearchLine+ReplaceWith End If If(表达式)<Len(SearchLine)Then vSearchLine=vSearchLine+Rights (SearchLine,Len (SearchLine) ―found―Len(SearchFor)+1) End If End If sReplace=vSeachLine End Function 过程中的“表达式”应为( )。