VBA代码加密解密（vba加密容易被破解）

'1.新建一个工作簿，打开，按ALT+F11，进入vba代码编辑器窗口：

'2.新建一个模块，“插入”--“模块”把以下代码复制进模块并保存。

Option Explicit

Private Declare Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Long, Source As Long, ByVal Length As Long)

Private Declare Function VirtualProtect Lib "kernel32" (lpAddress As Long, ByVal dwSize As Long, ByVal flNewProtect As Long, lpflOldProtect As Long) As Long

Private Declare Function GetModuleHandleA Lib "kernel32" (ByVal lpModuleName As String) As Long

Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, ByVal lpProcName As String) As Long

Private Declare Function DialogBoxParam Lib "user32" Alias "DialogBoxParamA" (ByVal hInstance As Long, ByVal pTemplateName As Long, ByVal hWndParent As Long, ByVal lpDialogFunc As Long, ByVal dwInitParam As Long) As Integer

Dim HookBytes(0 To 5) As Byte

Dim OriginBytes(0 To 5) As Byte

Dim pFunc As Long

Dim Flag As Boolean

Private Function GetPtr(ByVal Value As Long) As Long

GetPtr = Value

End Function

Public Sub RecoverBytes()

If Flag Then MoveMemory ByVal pFunc, ByVal VarPtr(OriginBytes(0)), 6

End Sub

Public Function Hook() As Boolean

Dim TmpBytes(0 To 5) As Byte

Dim p As Long

Dim OriginProtect As Long

Hook = False

pFunc = GetProcAddress(GetModuleHandleA("user32.dll"), "DialogBoxParamA")

If VirtualProtect(ByVal pFunc, 6, &H40, OriginProtect) <> 0 Then

MoveMemory ByVal VarPtr(TmpBytes(0)), ByVal pFunc, 6

If TmpBytes(0) <> &H68 Then

MoveMemory ByVal VarPtr(OriginBytes(0)), ByVal pFunc, 6

p = GetPtr(AddressOf MyDialogBoxParam)

HookBytes(0) = &H68

MoveMemory ByVal VarPtr(HookBytes(1)), ByVal VarPtr(p), 4

HookBytes(5) = &HC3

MoveMemory ByVal pFunc, ByVal VarPtr(HookBytes(0)), 6

Flag = True

Hook = True

End If

End If

End Function

Private Function MyDialogBoxParam(ByVal hInstance As Long, _

ByVal pTemplateName As Long, ByVal hWndParent As Long, _