How to make the multiple regex replace in one loop?

I want to regex replace the cell in one column 3 times, which A ---> 10, B ---> 11, C ---> 12

I know how to use the regex for once, but I need to use the code for 3 times in the vba, it seems so tedious. But I haven't found a easier way yet. Any better solution here?

    Set RegExp = CreateObject("vbscript.regexp")
    RegExp.Pattern = "B"
     
    Set SearchRange = ActiveSheet.Range("A4:A100")
    
    For Each Cell In SearchRange
        Set Matches = RegExp.Execute(Cell.Value)
        If Matches.Count >= 1 Then
            Set Match = Matches(0)
            Cell.Value = RegExp.Replace(Cell.Value, "11")
        End If
    Next

Update tnx a lot for your reply ,
I now use call sub

Sub Main()
 Call RegExp_Replace("A259", "JustTest", "key")
End Sub
 

Private Sub RegExp_Replace(OpRange, MatchStr, ReplaceStr)

    Dim RegExp As Object
    Dim SearchRange As Range, Cell As Range
    
    '此处定义正则表达式
    Set RegExp = CreateObject("vbscript.regexp")
    RegExp.Pattern = MatchStr
     
    '此处指定查找范围
    Set SearchRange = ActiveSheet.Range(OpRange)
    
    '遍历查找范围内的单元格
    For Each Cell In SearchRange
        Set Matches = RegExp.Execute(Cell.Value)
        If Matches.Count >= 1 Then
            Set Match = Matches(0)
            Cell.Value = RegExp.Replace(Cell.Value, ReplaceStr)
        End If
    Next

End Sub