Các chiêu thức trong lập trình Tùy chọn hộp thoại thông báo của chương trình home

Tùy chọn hộp thoại thông báo của chương trình home
Binh khí : Cần 2 nút ấn với tên CmdTest và cmdTest1, một Module
Xuất xứ : www.pscode.com
Đoạn mã
Trong Module
Option Explicit
Private Declare Function GetCurrentThreadId Lib "kernel32" () 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 FindWindowEx Lib "user32.dll" Alias
"FindWindowExA" (ByVal hwndParent As Long, ByVal hwndChildAfter As Long,
ByVal lpszClass As String, ByVal lpszWindow As String) As Long
Private Declare Function SetWindowText Lib "user32.dll" Alias
"SetWindowTextA" (ByVal HWND As Long, ByVal lpString As String) As Long
Private Declare Function GetClassName Lib "user32.dll" Alias
"GetClassNameA" (ByVal HWND As Long, ByVal lpClassName As String, ByVal
nMaxCount As Long) As Long
Private Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA"
(ByVal HWND As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As
Any) As Long
Private Const HCBT_ACTIVATE = 5
Private Const WH_CBT = 5
Private hHook As Long, ButtonText(3) As String, PasswordChar As Byte
Private Function ChangeButtonsText(ByVal lMsg As Long, ByVal wParam As
Long, ByVal lParam As Long) As Long
Dim t As Integer, cName As String, Length As Long, Btn(0 To 3) As Long
If lMsg = HCBT_ACTIVATE Then
Btn(0) = FindWindowEx(wParam, 0, vbNullString, vbNullString)

For t = 1 To 3
Btn(t) = FindWindowEx(wParam, Btn(t - 1), vbNullString,
vbNullString)
If Btn(t) = 0 Then Exit For
Next t
For t = 0 To 3
If (Btn(t) <> 0) And (Btn(t) <> wParam) Then
cName = Space(255)
Length = GetClassName(Btn(t), cName, 255)
cName = Left(cName, Length)
If UCase(cName) = "BUTTON" Then
If ButtonText(t) <> vbNullString Then SetWindowText
Btn(t), ButtonText(t)
End If
End If
Next t
UnhookWindowsHookEx hHook
End If
ChangeButtonsText = False
End Function
Private Function SetPasswordChar(ByVal lMsg As Long, ByVal wParam As Long,
ByVal lParam As Long) As Long
Const EM_SETPASSWORDCHAR As Long = &HCC
Dim t As Integer, cName As String, Length As Long, Btn(0 To 3) As Long
If lMsg = HCBT_ACTIVATE Then
Btn(0) = FindWindowEx(wParam, 0, vbNullString, vbNullString)
For t = 1 To 3
Btn(t) = FindWindowEx(wParam, Btn(t - 1), vbNullString,
vbNullString)
If Btn(t) = 0 Then Exit For

Next t
For t = 0 To 3
If (Btn(t) <> 0) And (Btn(t) <> wParam) Then
cName = Space(255)
Length = GetClassName(Btn(t), cName, 255)
cName = Left(cName, Length)
If LCase$(cName) = "edit" Then SendMessage Btn(t),
EM_SETPASSWORDCHAR, ByVal PasswordChar, ByVal 0&
End If
Next t
UnhookWindowsHookEx hHook
End If
SetPasswordChar = False
End Function
Public Function CustomMsgBox(ByVal zMessage As String, Optional ByVal
zButtons As VbMsgBoxStyle = vbOKOnly, Optional ByVal zTitle As String =
vbNullString, Optional ByVal Button1Text As String = vbNullString, Optional
ByVal Button2Text As String = vbNullString, Optional ByVal Button3Text As
String = vbNullString) As VbMsgBoxResult
Dim Thread As Long
ButtonText(0) = Button1Text
ButtonText(1) = Button2Text
ButtonText(2) = Button3Text
Thread = GetCurrentThreadId()
hHook = SetWindowsHookEx(WH_CBT, AddressOf ChangeButtonsText, ByVal 0&,
Thread)
If zTitle = vbNullString Then
CustomMsgBox = MsgBox(zMessage, zButtons)
Else
CustomMsgBox = MsgBox(zMessage, zButtons, zTitle)

End If
End Function
Public Function PasswordBox(ByVal zMessage As String, Optional ByVal zTitle
As String = vbNullString, Optional ByVal zPasswordChar As Byte = 42) As
String
Dim Thread As Long
PasswordChar = zPasswordChar
Thread = GetCurrentThreadId()
hHook = SetWindowsHookEx(WH_CBT, AddressOf SetPasswordChar, ByVal 0&,
Thread)
If zTitle = vbNullString Then
PasswordBox = InputBox(zMessage)
Else
PasswordBox = InputBox(zMessage, zTitle)
End If
End Function
Trong Form :
Private Sub CmdTest_Click()
PasswordBox "Moi ban nhap mat khau ???", "Thong bao"
End Sub
Private Sub cmdTest1_Click()
CustomMsgBox "Thu cho biet -_-", vbDefaultButton2, "Test", "Dong y", "Huy
bo"
End Sub