Option Explicit
'////////////////////////////////////////////////////////////////////
'Password masked inputbox
'Allows you to hide characters entered in a VBA Inputbox.
'
'Code written by Daniel Klann
'March 2003
'////////////////////////////////////////////////////////////////////
'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
Function InputBoxDK(Prompt, Title) As String
Dim lngModHwnd As Long, lngThreadID As Long
lngThreadID = GetCurrentThreadId
lngModHwnd = GetModuleHandle(vbNullString)
hHook = SetWindowsHookEx(WH_CBT, AddressOf NewProc, lngModHwnd, lngThreadID)
InputBoxDK = InputBox(Prompt, Title)
UnhookWindowsHookEx hHook
End Function
Sub MK()
Call GoiNhap(pwOK)
End Sub
Sub GoiNhap(ByVal bln As Boolean)
If bln = True Then
NhapHD.Show
Else
MsgBox Prompt:="Sai Mat Khau - Thu lai!", Buttons:=vbCritical + vbOKOnly
End If
End Sub
Private Function pwOK() As Boolean
pw = InputBoxDK(Prompt:="Nhap Mat Khau: ") ' loi vang ngay "pw"
pwOK = (pw = "Admin")
End Function
