Option Explicit
 
Private Declare Sub RtlMoveMemory Lib "kernel32" (ByVal pDst As Long, ByVal pSrc As Long, ByVal ByteLen As Long)
Private Declare Function WaitMessage Lib "user32" () As Long
  
Enum eTime
     Horas = 3600
     Minutos = 60
     Segundos = 1
End Enum
  
Public Sub Wait(ByVal vToWait&, Optional ByVal ThisWait As eTime = Segundos, Optional ByVal UseAllProc As Boolean = False)
Dim vDateE      As Date
     vDateE = DateAdd("s", vToWait& * (ThisWait + 0), Time)
     Do While vDateE > Time
         Call WaitMessage
         If Not UseAllProc Then DoEvents
     Loop
End Sub

Private Sub Form_Click()
Dim laux0               As Long
Dim i                   As Long
Dim bRes                As Boolean
Dim spli()              As String
Dim ctmr                As CTiming

    Show
    Call Wait(1, Segundos, False)
    Set ctmr = New CTiming
    
    '   //  Test Fiabilidad.
    spli = Split("&H221231321| &H2212313215646546546546516516512|9999999999999999999999999999999999999999999999999999| 0. 0|3" & Chr(10) & "0|3000" & Chr(10) & "0|    &H1000000000|  s  &H1000000000" & _
                "|  +.  &H1000000000|  +. &H1000000000|  +.a &H1000000000|  +.a &H100000000v|  +.a &H1000000  00v" & _
                "|&H1000000  00v|&H1000000  00|+1.0e45|+e1. .2|+0e+11|.+0e+11|+1.0d45|+d1. .2|+0d+11|.+0d+11|" & _
                "|+1. .2|0|+0.|+.  0|+|+  0|" & Chr(10) & "-0|." & vbTab & " .+0|.0" & vbTab & vbNewLine & vbTab & vbNewLine & vbTab & vbNewLine & " .+0" & _
                "|" & vbTab & vbNewLine & vbTab & vbNewLine & vbTab & vbNewLine & " +.0 " & _
                "|" & vbTab & vbNewLine & vbTab & vbNewLine & vbTab & vbNewLine & " +00.0 " & _
                "|" & vbTab & vbNewLine & vbTab & vbNewLine & vbTab & vbNewLine & " --.0 " & _
                "|" & vbTab & Space(10) & vbNewLine & " +-+-.+.0|" & vbTab & " +.0", "|")
    
    '   //  Test de tiempos...
    For i = 0 To UBound(spli)
        bRes = IsNumeric(spli(i))
        If Not (bRes = isNumeric_Black(spli(i))) Then
            Debug.Print "Error: isNumeric_Black (""" & spli(i) & """)"
        End If
        If Not (bRes = Is_NumberT(spli(i))) Then
            Debug.Print "Error: Is_NumberT (""" & spli(i) & """)"
        End If
        If Not (bRes = IsNumeric_TGa(spli(i))) Then
            Debug.Print "Error: IsNumeric_TGa (""" & spli(i) & """)"
        End If
        If Not (bRes = IsNumeric_r338v2(spli(1))) Then
            Debug.Print "Error: IsNumeric_r338v2(""" & spli(i) & """)"
        End If
        If Not (bRes = IsNumeric_LeandroA(spli(1))) Then
            Debug.Print "Error: IsNumeric_LeandroA(""" & spli(i) & """)"
        End If
        
        If Not (bRes = IsNumeric_7913(spli(1))) Then
            Debug.Print "Error: IsNumeric_7913(""" & spli(i) & """)"
        End If
    Next
    
    Me.AutoRedraw = True
    '   //  Test entre usuarios.
    ctmr.Reset
    For laux0 = 1 To 1000
        For i = 0 To UBound(spli)
            IsNumeric spli(i)
        Next
    Next laux0
    Me.Print "IsNumeric()", ctmr.sElapsed
    Call Wait(1, Segundos, False)
    
    ctmr.Reset
    For laux0 = 1 To 1000
        For i = 0 To UBound(spli)
            isNumeric_Black spli(i)
        Next
    Next laux0
    Me.Print "IsNumeric_Black()", ctmr.sElapsed
    Call Wait(1, Segundos, False)
    
    ctmr.Reset
    For laux0 = 1 To 1000
        For i = 0 To UBound(spli)
            Is_NumberT spli(i)
        Next
    Next laux0
    Me.Print "Is_NumberT()", ctmr.sElapsed
    Call Wait(1, Segundos, False)
    
    ctmr.Reset
    For laux0 = 1 To 1000
        For i = 0 To UBound(spli)
            IsNumeric_TGa spli(i)
        Next
    Next laux0
    Me.Print "IsNumeric_TGa()", ctmr.sElapsed
    Call Wait(1, Segundos, False)
    
    ctmr.Reset
    For laux0 = 1 To 1000
        For i = 0 To UBound(spli)
            IsNumeric_7913 spli(i)
        Next
    Next laux0
    Me.Print "IsNumeric_7913()", ctmr.sElapsed
    Call Wait(1, Segundos, False)
    
    ctmr.Reset
    For laux0 = 1 To 1000
        For i = 0 To UBound(spli)
            IsNumeric_r338v2 spli(i)
        Next
    Next laux0
    Me.Print "IsNumeric_r338v2()", ctmr.sElapsed
    Call Wait(1, Segundos, False)
    
    
    Me.Print "Finalizado"
    Set ctmr = Nothing
    Show
    SetFocus
End Sub

Public Function isNumeric_Black(ByRef sString As String) As Boolean
'   //  Version 3.0
Dim lPos    As Long     '   //  For Next
Dim lLn     As Long     '   //  Longitud de sString
Dim lData   As Long     '   //  Caracter, Switcher, Contador (QWord)

Const PUNTO_DECIMAL As Long = &H10000
Const SIGNO_SRC     As Long = &H20000
Const NUMBER_HEX    As Long = &H40000
Const NUMBER_OK     As Long = &H80000
Const NUMBER_POW    As Long = &H100000
Const NUMBER_POWF   As Long = &H200000
Const NUMBER_POWC   As Long = &H300000
Const NUMBER_FINISH As Long = &H400000
 
    lLn = Len(sString)
    If (lLn = &H0) Then Exit Function
    lLn = ((lLn + lLn) - &H1)
 
    For lPos = &H0 To lLn Step &H2
 
        RtlMoveMemory VarPtr(lData) + &H3, StrPtr(sString) + lPos, &H1
 
        If ((lData And NUMBER_HEX) = NUMBER_HEX) Then
            If (((lData And &HFF000000) >= &H30000000) And ((lData And &HFF000000) <= &H39000000)) Or _
               (((lData And &HFF000000) >= &H61000000) And ((lData And &HFF000000) <= &H66000000)) Or _
               (((lData And &HFF000000) >= &H41000000) And ((lData And &HFF000000) <= &H46000000)) Then   '   //  Numeros Hexadecimales
                lData = (lData Or NUMBER_OK)
                If ((lData And NUMBER_FINISH) = NUMBER_FINISH) Then Exit Function
                lData = (lData + &H1)
                If ((lData And &HFF) > &H10) Then Exit Function   '   //  QWord (Max Double)
                
            Else
                Select Case (lData And &HFF000000)
                    Case &H9000000, &HA000000, &HB000000, &HC000000, &HD000000, &H24000000, &H20000000, &HA0000000 '   //   Espacios en Blanco
                       If ((lData And NUMBER_OK) = NUMBER_OK) Then lData = (lData Or NUMBER_FINISH)
                    Case Else
                        If ((lData And NUMBER_FINISH) = NUMBER_FINISH) Then Exit Function
                End Select
            End If
        Else
            If ((lData And &HFF000000) >= &H30000000) And ((lData And &HFF000000) <= &H39000000) Then
                lData = (lData Or NUMBER_OK)
                If ((lData And NUMBER_FINISH) = NUMBER_FINISH) Then Exit Function
                If ((lData And NUMBER_POWC) = NUMBER_POW) Then lData = (lData Or NUMBER_POWF)
 
            Else
                Select Case (lData And &HFF000000)
                    Case &H0 '   //  NULL Indica que se termina la cadena.
                        If ((lData And NUMBER_POWC) = NUMBER_POW) Then Exit Function
                        Exit For
 
                    Case &H2E000000 '   //  "."  Solo 1
                        If ((lData And NUMBER_POWC) = NUMBER_POW) Then Exit Function
                         If ((lData And NUMBER_FINISH) = NUMBER_FINISH) Then Exit Function
                         If ((lData And PUNTO_DECIMAL) = PUNTO_DECIMAL) Then Exit Function
                         lData = (lData Or PUNTO_DECIMAL)
 
                    Case &H2B000000, &H2D000000 '   //  "+|-" Solo 1
                        If ((lData And NUMBER_POWC) = NUMBER_POW) Then
                            lData = (lData Or NUMBER_POWF)
                        Else
                            If ((lData And NUMBER_OK) = NUMBER_OK) Then Exit Function
                            If ((lData And PUNTO_DECIMAL) = PUNTO_DECIMAL) Then Exit Function
                            If ((lData And SIGNO_SRC) = SIGNO_SRC) Then Exit Function
                        End If
                        If ((lData And NUMBER_FINISH) = NUMBER_FINISH) Then Exit Function
                        lData = (lData Or SIGNO_SRC)
 
                    Case &H2C000000
                        If Not ((lData And NUMBER_OK) = NUMBER_OK) Then Exit Function
                        If ((lData And NUMBER_POWC) = NUMBER_POW) Then Exit Function
 
                    Case &H9000000, &HA000000, &HB000000, &HC000000, &HD000000, &H24000000   '   //  Solo se permiten al inicio de un Numero (Espacios en Blanco).
                        If ((lData And PUNTO_DECIMAL) = PUNTO_DECIMAL) Then Exit Function
                        If ((lData And NUMBER_FINISH) = NUMBER_FINISH) Then Exit Function
                        If ((lData And NUMBER_OK) = NUMBER_OK) Then Exit Function
                        If ((lData And NUMBER_POWC) = NUMBER_POW) Then Exit Function
 
                    Case &HA0000000, &H20000000 '   //  Se permiten al Inicio/final de un numero.
                        If ((lData And NUMBER_OK) = NUMBER_OK) Then
                            lData = (lData Or NUMBER_FINISH)
                        Else
                            If ((lData And PUNTO_DECIMAL) = PUNTO_DECIMAL) Then Exit Function
                            If ((lData And NUMBER_POWC) = NUMBER_POW) Then Exit Function
                        End If
 
                    Case &H26000000 '   //  Es un Numero Hexadecimal
                        If ((lData And NUMBER_FINISH) = NUMBER_FINISH) Then Exit Function
                        If ((lData And NUMBER_OK) = NUMBER_OK) Then Exit Function
                        If ((lData And SIGNO_SRC) = SIGNO_SRC) Then Exit Function
                        If ((lData And PUNTO_DECIMAL) = PUNTO_DECIMAL) Then Exit Function
                        If ((lData And NUMBER_POWC) = NUMBER_POW) Then Exit Function
 
                        RtlMoveMemory VarPtr(lData) + &H3, StrPtr(sString) + (lPos + &H2), &H1
                        If ((lData And &HFF000000) = &H48000000) Or ((lData And &HFF000000) = &H68000000) Then lData = (lData Or NUMBER_HEX): lPos = lPos + &H2
 
                    Case &H44000000, &H45000000, &H64000000, &H65000000 ' //  Numeros en Formato ###e-###, ###e+###
                        If ((lData And NUMBER_FINISH) = NUMBER_FINISH) Then Exit Function
                        If ((lData And NUMBER_POW) = NUMBER_POW) Then Exit Function
                        If ((lData And NUMBER_OK) = NUMBER_OK) Then
                            lData = (lData Or NUMBER_POW)
                            If ((lData And SIGNO_SRC) = SIGNO_SRC) Then lData = (lData Xor SIGNO_SRC)    '   //  Permitimos nuevamente los signos "+" y "-".
                        Else
                            Exit Function
                        End If
 
                    Case Else
                        Exit Function
 
                End Select
            End If
        End If
    Next
    If ((lData And NUMBER_OK) = NUMBER_OK) Then isNumeric_Black = True    '   // Finalizacion.
End Function

Public Function Is_NumberT(ByVal str As String) As Boolean
On Error GoTo err
Dim L As Long
L = str + 1
Is_NumberT = True
Exit Function
err:
End Function

Private Function IsNumeric_TGa(str As String) As Boolean
    Dim sAux As String
    Dim lPos As Long, lCont As Long, lAsc As Long
    lPos = 1
 
    Do While lPos <= Len(str)
        IsNumeric_TGa = True
        sAux = Mid$(str, lPos, 1)
        lAsc = Asc(sAux)
        If (lAsc >= 48 And lAsc <= 57) Or (lAsc >= 43 And lAsc <= 46) Then
            If lAsc = 44 Then
                lCont = lCont + 1
                If lCont > 1 Then
                    IsNumeric_TGa = False
                    Exit Function
                End If
            End If
        Else
            IsNumeric_TGa = False
            Exit Function
        End If
        lPos = lPos + 1
    Loop
End Function

Private Function IsNumeric_r338v2(ByVal str As String) As Boolean
    Dim cReg As Object
    Set cReg = CreateObject("VBScript.RegExp")
    str = Trim$(str)
    With cReg
        ' Testeamos con . como separador de miles y , como separador de decimales
        ' Personalmente seria para mi "^-?(?:\d{1,3}(?:\.\d{3})*|\d+)(?:\,\d+)?$"
        ' ya que 133.23.330 no es un numero aunque IsNumeric diga que si ¬¬
        .Pattern = "^[+\-]?(?:\d{1,3}(?:\.\d{1,3})*|\d*)\,?\d*?$"
        .Global = True
        .IgnoreCase = True
    End With
    IsNumeric_r338v2 = cReg.Test(str)
    If Not IsNumeric_r338v2 Then
        While InStr(str, "..")
            str = Replace$(str, "..", vbNullString)
        Wend
        ' Testeamos con , como separador de miles y . como separador de decimales
        cReg.Pattern = "^[+\-]?(?:\d{1,3}(?:\,\d{3})*|\d+)\.?\d*$"
        IsNumeric_r338v2 = cReg.Test(str)
    End If
    Set cReg = Nothing
End Function

Private Function IsNumeric_LeandroA(expression) As Boolean
    Select Case VarType(expression)
        Case vbBoolean, vbByte, vbInteger, vbLong, vbCurrency, vbDecimal, vbDouble, vbNull, vbEmpty, vbError
            IsNumeric_LeandroA = True
        Case vbArray, vbDataObject, vbDate, vbObject, vbUserDefinedType
            IsNumeric_LeandroA = False
        Case vbString
            If Val(expression) <> 0 Then
                IsNumeric_LeandroA = True
            Else
                On Error Resume Next
                IsNumeric_LeandroA = Abs(expression) + 1
            End If
    End Select
End Function

Private Function IsNumeric_7913(str As String) As Boolean
Dim x As Double
On Error GoTo Nonum
    x = str
    IsNumeric_7913 = True
Nonum:
End Function

Error: Is_NumberT ("&H221231321")
Error: IsNumeric_TGa ("&H221231321")
Error: IsNumeric_r338v2("&H221231321")
Error: IsNumeric_LeandroA("&H221231321")
Error: IsNumeric_7913("&H221231321")
Error: Is_NumberT ("9999999999999999999999999999999999999999999999999999")
Error: IsNumeric_r338v2("9999999999999999999999999999999999999999999999999999")
Error: IsNumeric_LeandroA("9999999999999999999999999999999999999999999999999999")
Error: IsNumeric_7913("9999999999999999999999999999999999999999999999999999")
Error: Is_NumberT ("    &H1000000000")
Error: IsNumeric_TGa ("    &H1000000000")
Error: IsNumeric_r338v2("    &H1000000000")
Error: IsNumeric_LeandroA("    &H1000000000")
Error: IsNumeric_7913("    &H1000000000")
Error: Is_NumberT ("+1.0e45")
Error: IsNumeric_TGa ("+1.0e45")
Error: IsNumeric_r338v2("+1.0e45")
Error: IsNumeric_LeandroA("+1.0e45")
Error: IsNumeric_7913("+1.0e45")
Error: IsNumeric_TGa ("+0e+11")
Error: IsNumeric_r338v2("+0e+11")
Error: IsNumeric_LeandroA("+0e+11")
Error: IsNumeric_7913("+0e+11")
Error: Is_NumberT ("+1.0d45")
Error: IsNumeric_TGa ("+1.0d45")
Error: IsNumeric_r338v2("+1.0d45")
Error: IsNumeric_LeandroA("+1.0d45")
Error: IsNumeric_7913("+1.0d45")
Error: IsNumeric_TGa ("+0d+11")
Error: IsNumeric_r338v2("+0d+11")
Error: IsNumeric_LeandroA("+0d+11")
Error: IsNumeric_7913("+0d+11")
Error: IsNumeric_r338v2("0")
Error: IsNumeric_LeandroA("0")
Error: IsNumeric_7913("0")
Error: IsNumeric_r338v2("+0.")
Error: IsNumeric_LeandroA("+0.")
Error: IsNumeric_7913("+0.")
Error: IsNumeric_TGa ("+")
Error: IsNumeric_TGa ("+  0")
Error: IsNumeric_r338v2("+  0")
Error: IsNumeric_LeandroA("+  0")
Error: IsNumeric_7913("+  0")
Error: IsNumeric_TGa ("
-0")
Error: IsNumeric_r338v2("
-0")
Error: IsNumeric_LeandroA("
-0")
Error: IsNumeric_7913("
-0")
Error: IsNumeric_TGa (" 
    
    
 +.0 ")
Error: IsNumeric_r338v2("   
    
    
 +.0 ")
Error: IsNumeric_LeandroA(" 
    
    
 +.0 ")
Error: IsNumeric_7913(" 
    
    
 +.0 ")
Error: IsNumeric_TGa (" 
    
    
 +00.0 ")
Error: IsNumeric_r338v2("   
    
    
 +00.0 ")
Error: IsNumeric_LeandroA(" 
    
    
 +00.0 ")
Error: IsNumeric_7913(" 
    
    
 +00.0 ")
Error: IsNumeric_TGa ("  +.0")
Error: IsNumeric_r338v2("    +.0")
Error: IsNumeric_LeandroA("  +.0")
Error: IsNumeric_7913("  +.0")