I share my Code, as anticipated in the following thread:

Function Convert•Num‹Num(Number As String, BaseNew_2Binary_8Octal_10Decimal_16Hexadecimal As Integer, BaseOld_2Binary_8Octal_10Decimal_16Hexadecimal As Integer, Optional QuantityDigitsToReturn As Integer) As String
   'Pass a Number, from a certain Base, to another different Base
   'The Number Parameter is actually a String that represents the input Number
   'QuantityDigitsToReturn completes with 0 on the left so that the total number of digits of the number is as requested. If 0 is passed there will be no modifications
   'Be careful: this amount cannot be less than the number of digits in the result, otherwise it will be truncated.
    Dim Cad As String, BV As Integer, BN As Integer, DC As Integer
    BV = BaseOld_2Binary_8Octal_10Decimal_16Hexadecimal
    BN = BaseNew_2Binary_8Octal_10Decimal_16Hexadecimal
    DC = QuantityDigitsToReturn
    Cad = Convert•Num‹Dec(Convert•Dec‹Num(Number, BV), BN)
    If DC > 0 Then Cad = Right(String(64, "0") & Cad, DC)
    Convert•Num‹Num = Cad
End Function

 Function Convert•Dec‹Num(Number As String, BaseOld_2Binary_8Octal_16Hexadecimal As Integer) As String
   'Go to Decimal (Base 10), a Number that is originally Binary (Base 2), Octal (Base 8) or Hexadecimal (Base 16)
    Dim Ptr As Integer, DA As String, CD As Integer, B10 As Long, CA As Integer, Base As Integer
    Base = BaseOld_2Binary_8Octal_16Hexadecimal
    CD = Len(Trim(Number))
    For Ptr = 1 To CD
        DA = Mid(Number, Ptr, 1)
        DA = UCase(DA)
        CA = Asc(DA)
        Select Case Base
            Case 2:  If CA < 48 Or CA > 49 Then MsgBox ("Number specification error, if its base is binary"): Exit Function
            Case 8:  If CA < 48 Or CA > 56 Then MsgBox ("Number specification error, if its base is octal"): Exit Function
            Case 16: If CA < 48 Or (CA > 57 And CA < 65) Or (CA > 70) Then MsgBox ("Number specification error, if its base is hexadecimal"): Exit Function
        End Select
        If CA > 64 Then DA = "&H" & DA
        B10 = B10 + Val(DA) * Base ^ (CD - Ptr)
    Convert•Dec‹Num = B10
End Function

Function Convert•Num‹Dec(Number As String, BaseNew_2Binary_8Octal_16Hexadecimal As Integer) As String
   'Go to Binary (Base 2), Octal (Base 8) or Hexadecimal (Base 16), a Number that is originally Decimal (Base 10)
    Dim DA As Integer, Cad As String, DR As Long, Base As Integer
    Base = BaseNew_2Binary_8Octal_16Hexadecimal
    DR = CLng(Trim(Number))
    Do While DR > 0
        DA = DR Mod Base
        If Not DA > 9 Then Cad = Format(DA) & Cad Else Cad = Chr(55 + DA) & Cad
        DR = DR \ Base
    Convert•Num‹Dec = Cad
End Function