word甲烷一键下标

Sub 甲烷下标()
'
' 甲烷下标 宏
'
'
    Selection.Find.ClearFormatting
    Selection.Find.Replacement.ClearFormatting
    With Selection.Find
        .Text = "CH4"
        .Replacement.Text = "CHguoshao4"
        .Forward = True
        .Wrap = wdFindContinue
        .Format = False
        .MatchCase = False
        .MatchWholeWord = False
        .MatchByte = True
        .MatchWildcards = False
        .MatchSoundsLike = False
        .MatchAllWordForms = False
    End With
    Selection.Find.Execute Replace:=wdReplaceAll
    Selection.Find.ClearFormatting
    Selection.Find.Replacement.ClearFormatting
    With Selection.Find.Replacement.Font
        .Superscript = False
        .Subscript = True
    End With
    With Selection.Find
        .Text = "guoshao4"
        .Replacement.Text = "4"
        .Forward = True
        .Wrap = wdFindContinue
        .Format = True
        .MatchCase = False
        .MatchWholeWord = False
        .MatchByte = True
        .MatchWildcards = False
        .MatchSoundsLike = False
        .MatchAllWordForms = False
    End With
    Selection.Find.Execute Replace:=wdReplaceAll
End Sub

思路是将CH4替换为CH和一个特殊的文字，然后将这个特殊的文字，替换为下标的4。PS：CH4中的CH忽略大小写，均会被替换为大写的CH。