'---------------------------------------------------------------------------------------
' Module      : cEditSvr
' DateTime    : 19/09/2008 13:23
' Author      : Cobein
' Mail        : cobein27@hotmail.com
' WebPage     : http://www.advancevb.com.ar
' Purpose     : Read Write data at EOF
' Usage       : At your own risk
' Requirements: None
' Distribution: You can freely use this code in your own
'               applications, but you may not reproduce
'               or publish this code on any web site,
'               online service, or distribute as source
'               on any media without express permission.
'
' History     : 19/09/2008 First Cut....................................................
'---------------------------------------------------------------------------------------
Option Explicit
 
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (pDst As Any, pSrc As Any, ByVal ByteLen As Long)
 
Private c_pBag      As New PropertyBag
Private c_sFile     As String
Private c_lEOF      As Long
Public c_bHasData  As Boolean
 
'---------------------------------------------------------------------------------------
' Procedure : GetEOF
' Author    : E0N
' Purpose   : Calculate EOF
'---------------------------------------------------------------------------------------
Private Function GetEOF(sPath As String) As Long
    Dim vbData() As Byte
    Dim PE As Long, NumberOfSections As Integer
    Dim BeginLastSection As Long
    Dim RawSize As Long, RawOffset As Long
 
    Open sPath For Binary As #1
        ReDim vbData(LOF(1) - 1)
        Get #1, , vbData
    Close #1
 
    Call CopyMemory(PE, vbData(&H3C), 4)
    Call CopyMemory(NumberOfSections, vbData(PE + &H6), 2)
    BeginLastSection = PE + &HF8 + ((NumberOfSections - 1) * &H28)
    Call CopyMemory(RawSize, vbData(BeginLastSection + 16), 4)
    Call CopyMemory(RawOffset, vbData(BeginLastSection + 20), 4)
    GetEOF = RawSize + RawOffset
End Function
 
Public Function ExeFile(sPath As String) As Boolean
    c_sFile = sPath
    c_lEOF = GetEOF(c_sFile)
 
    If Not FileLen(c_sFile) = c_lEOF Then
        c_bHasData = True
 
        Dim vbData() As Byte
 
        Open c_sFile For Binary As #1
        ReDim vbData(LOF(1) - c_lEOF - 1)
        Seek #1, c_lEOF + 1
        Get #1, , vbData
        Close #1
        '+++++++++++++++++++++++++++++++++++++++++++++++++++++
        'At this point you can Decrypt the byte array [vbData]
        '+++++++++++++++++++++++++++++++++++++++++++++++++++++
        Set c_pBag = New PropertyBag
        c_pBag.Contents = vbData
    End If
 
End Function
 
Public Sub WriteProp(sName As String, vVal As Variant)
    c_pBag.WriteProperty sName, vVal
End Sub
 
Public Function ReadProp(sName As String) As Variant
    ReadProp = c_pBag.ReadProperty(sName)
End Function
 
Public Function WriteData(sDstFile As String) As Boolean
    Dim vbData() As Byte
 
    Open c_sFile For Binary Access Read As #1
    ReDim vbData(LOF(1) - 1)
    Get #1, , vbData
    Close #1
 
    Open sDstFile For Binary Access Write As #1
    Put #1, , vbData
    vbData = c_pBag.Contents
    '+++++++++++++++++++++++++++++++++++++++++++++++++++++
    'At this point you can Encrypt the byte array [vbData]
    '+++++++++++++++++++++++++++++++++++++++++++++++++++++
    Put #1, , vbData
    Close #1
 
End Function
 

Option Explicit
 
Private Sub Form_Load()
 
    Dim c As New cEditSvr
    c.ExeFile "c:\proyecto1.exe"
    c.WriteProp "IP", "123.123.123.123"
    c.WriteProp "Port", 1234
    c.WriteData "c:\test.exe"
 
 
    Set c = New cEditSvr
    c.ExeFile "c:\test.exe"
    Debug.Print c.ReadProp("IP")
    Debug.Print c.ReadProp("Port")
End Sub