VBA – Utilizando InputBox com Máscara (senha)

InputBox com Senha
InputBox com Senha

Tirado o blog do Luiz Cláudio que tirou do excelfiles.com. Aí vai mais uma referência.

O InputBox é função extremamente prática para coletar dados de maneira rápida ao usuário. Porém, seria muito bacana se fosse possível estender algumas de suas possbilidades. Uma delas seria se, por exemplo, fosse possível adicionar uma máscara de forma que o usuário pudesse digitar uma senha no InputBox.

Pois bem. A macro abaixo faz exatamente isso:

'////////////////////////////////////////////////////////////////////
'Password masked inputbox
'Allows you to hide characters entered in a VBA Inputbox.
'
'Code written by Daniel Klann
'http://www.danielklann.com/
'March 2003
 
'// Kindly permitted to be amended
'// Amended by Ivan F Moala
'// http://www.xcelfiles.com
'// April 2003
'// Works for Xl2000+ due the AddressOf Operator
'////////////////////////////////////////////////////////////////////
 
'API functions to be used
Private Declare Function CallNextHookEx Lib "user32" (ByVal hHook As Long, _
                                                      ByVal ncode As Long, ByVal wParam As Long, lParam As Any) As Long
 
Private Declare Function GetModuleHandle Lib "kernel32" Alias "GetModuleHandleA" ( _
                                         ByVal lpModuleName As String) As Long
 
Private Declare Function SetWindowsHookEx Lib "user32" Alias "SetWindowsHookExA" ( _
                                          ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) _
                                          As Long
 
Private Declare Function UnhookWindowsHookEx Lib "user32" (ByVal hHook As Long) As Long
 
Private Declare Function SendDlgItemMessage Lib "user32" Alias "SendDlgItemMessageA" ( _
                                            ByVal hDlg As Long, ByVal nIDDlgItem As Long, ByVal wMsg As Long, ByVal wParam As Long, _
                                            ByVal lParam As Long) As Long
 
Private Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hWnd As Long, _
                                                                          ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
 
Private Declare Function GetCurrentThreadId Lib "kernel32" () As Long
 
'Constants to be used in our API functions
Private Const EM_SETPASSWORDCHAR = &HCC
Private Const WH_CBT = 5
Private Const HCBT_ACTIVATE = 5
Private Const HC_ACTION = 0
 
Private hHook As Long
 
Public Function NewProc(ByVal lngCode As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
 
    Dim RetVal
    Dim strClassName As String, lngBuffer As Long
 
    If lngCode < HC_ACTION Then
        NewProc = CallNextHookEx(hHook, lngCode, wParam, lParam)
        Exit Function
    End If
 
    strClassName = String$(256, " ")
    lngBuffer = 255
 
    If lngCode = HCBT_ACTIVATE Then    'A window has been activated
        RetVal = GetClassName(wParam, strClassName, lngBuffer)
        If Left$(strClassName, RetVal) = "#32770" Then    'Class name of the Inputbox
            'This changes the edit control so that it display the password character *.
            'You can change the Asc("*") as you please.
            SendDlgItemMessage wParam, &H1324, EM_SETPASSWORDCHAR, Asc("*"), &H0
        End If
    End If
 
    'This line will ensure that any other hooks that may be in place are
    'called correctly.
    CallNextHookEx hHook, lngCode, wParam, lParam
 
End Function
 
'// Make it public = avail to ALL Modules
'// Lets simulate the VBA Input Function
Public Function InputBoxDK(Prompt As String, Optional Title As String, Optional Default As String, _
                           Optional Xpos As Long, Optional Ypos As Long, Optional Helpfile As String, _
                           Optional Context As Long) As String
 
    Dim lngModHwnd As Long, lngThreadID As Long
 
    '// Lets handle any Errors JIC! due to HookProc> App hang!
    On Error GoTo ExitProperly
    lngThreadID = GetCurrentThreadId
    lngModHwnd = GetModuleHandle(vbNullString)
 
    hHook = SetWindowsHookEx(WH_CBT, AddressOf NewProc, lngModHwnd, lngThreadID)
    If Xpos Then
        InputBoxDK = InputBox(Prompt, Title, Default, Xpos, Ypos, Helpfile, Context)
    Else
        InputBoxDK = InputBox(Prompt, Title, Default, , , Helpfile, Context)
    End If
 
ExitProperly:
    UnhookWindowsHookEx hHook
 
End Function

Para fazê-la funcionar, adicione o código acima a um módulo e use a seguinte chamanda:

1
2
3
Sub Teste()
    MsgBox InputBoxDK("Digite sua senha", "Atenção", "123456")
End Sub

Funciona muito bem. Agradecimentos ao autor da macro, o MVP inglês Daniel Klann.

Comentários

comentários

2 thoughts on “VBA – Utilizando InputBox com Máscara (senha)”

  1. meu caro, tentei executar esse codigo, mas deu erro na linha 87: “tipos incompatíveis” do NewProc, mesmo a função retornando um Long. Estou usando o excel 2010 com windows 64 bits. Sabes como posso consertar o codigo? Sds.

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