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Zinglish
How do I cheat?
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Joined: 06 Jul 2010
Posts: 6
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 Posted: Thu Jul 08, 2010 4:19 am Post subject: ReadProcessMemory returning wrong value! [VB6] |
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Hey guys, I am making my first trainer in VB6 (Old as, i know!).
I have this in my form:
| Code: |
Private Sub cmdTest_Click()
Dim hwnd As Long 'Window's handle
Dim pid 'Process ID
Dim pHandle 'Process Handle
Dim Buff As Long
Buff = 1
hwnd = FindWindow(vbNullString, "Solitaire")
GetWindowThreadProcessId hwnd, pid
pHandle = OpenProcess(PROCESS_ALL_ACCESS, False, pid)
ReadProcessMemory pHandle, &H585F9C8, Buff, 4, 0&
Text1.Text = CLng(Buff)
CloseHandle pHandle
End Sub |
And this in a Module:
| Code: | Public Declare Function FindWindow Lib "user32.dll" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Public Declare Function GetWindowThreadProcessId Lib "user32.dll" (ByVal hwnd As Long, ByRef lpdwProcessId As Long) As Long
Public Declare Function OpenProcess Lib "kernel32.dll" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Public Declare Function WriteProcessMemory Lib "kernel32.dll" (ByVal hProcess As Long, ByRef lpBaseAddress As Any, ByRef lpBuffer As Any, ByVal nSize As Long, ByRef lpNumberOfBytesWritten As Long) As Long
Public Declare Function ReadProcessMemory Lib "kernel32.dll" (ByVal hProcess As Long, ByRef lpBaseAddress As Any, ByRef lpBuffer As Any, ByVal nSize As Long, ByRef lpNumberOfBytesWritten As Long) As Long
Public Declare Function CloseHandle Lib "kernel32.dll" (ByVal hObject As Long) As Long
Public Const PROCESS_ALL_ACCESS As Long = &HFFF
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It refuses to give me a real value! In fact every address I try gives me the same value, talk about epic failure on the first god damn try: FAIL
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Jani
Grandmaster Cheater
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Joined: 29 Dec 2006
Posts: 804
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| Posted: Thu Jul 08, 2010 10:44 am Post subject: |
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| I don't know VB6, but I'd guess wrong byte order. DWORD 0x12345678 is written as 0x78 0x56 0x34 0x12 in the memory. If you want to read more, here's the keyword: endianness
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atom0s
Moderator
 Reputation: 205
Joined: 25 Jan 2006
Posts: 8587
Location: 127.0.0.1
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| Posted: Thu Jul 08, 2010 6:48 pm Post subject: |
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Set breakpoints and walk through the code as it's running. Also add error checking to see if something is failing.
Also make sure you are reading the correct size for the address you wish to obtain the value of. 4 will not be the size you use for everything.
@Jani: VB6 will read back values in the correct format. (Assuming he's looking for a basic value and not bytes of a function etc.)
_________________
- Retired. |
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hcavolsdsadgadsg
I'm a spammer
![]() Reputation: 26
Joined: 11 Jun 2007
Posts: 5801
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| Posted: Thu Jul 08, 2010 8:10 pm Post subject: |
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Seriously consider switching to something like C#
You'll probably find that it makes your life a lot easier.
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