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Amigo pero deberia funcionar como yo lo puse porque fijate yo saque el codigo de un Trainer de el juego GTA: San Andreas con WriteProcessMemory y de ahi fue de donde me guie yo...

Este es parte del codigo del trainer:

Código [Seleccionar] Expandir

Private Sub FreezeTime()
Dim hwnd As Long
Dim pid As Long
Dim pHandle As Long
Dim x As Integer

hwnd = FindWindow(vbNullString, "GTA: San Andreas")
If (hwnd = 0) Then hwnd = FindWindow(vbNullString, "GTA: San Andreas")

If (hwnd = 0) Then
    lblState.Caption = "State: Jeu non Lancer."
    Timer1.Enabled = False
    Exit Sub
End If

GetWindowThreadProcessId hwnd, pid

pHandle = OpenProcess(PROCESS_ALL_ACCESS, False, pid)

If (pHandle = 0) Then
    lblState.Caption = "State: Couldn't get a process handle."
    Timer1.Enabled = False
    Exit Sub
End If

WriteProcessMemory pHandle, Hex2Dec("52CF53"), Hex2ASCII("90 90 90 90 90 90"), Len(Hex2ASCII("90 90 90 90 90 90")), 0&

CloseHandle pHandle
End Sub

Muchas gracias ya me pongo a verlo.

Yo probe tu codigo que pusiste y me los listo como tu quieres...

Bueno estaba probando para cambiar el nombre del jugador en el CS (Counter Strike) 1.6 y bueno lo logre con el CE (Cheat Engine) y quise hacerlo con VB6 hice lo siguiente pero no me da resultado pareciera que no escribe...

Código [Seleccionar] Expandir


Option Explicit

Private Const PROCESS_ALL_ACCESS As Long = &H1F0FFF

Private Declare Function GetAsyncKeyState Lib "user32.dll" ( _
        ByVal vKey As Long) As Integer

Private Declare Function FindWindow Lib "user32.dll" Alias "FindWindowA" ( _
        ByVal lpClassName As String, _
        ByVal lpWindowName As String) As Long

Private Declare Function GetWindowThreadProcessId Lib "user32.dll" ( _
        ByVal hwnd As Long, _
        ByRef lpdwProcessId As Long) As Long
       
Private Declare Function OpenProcess Lib "kernel32.dll" ( _
        ByVal dwDesiredAccess As Long, _
        ByVal bInheritHandle As Long, _
        ByVal dwProcessId As Long) As Long
       
Private 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

Private Declare Function CloseHandle Lib "kernel32.dll" ( _
        ByVal hObject As Long) As Long
       
Private Sub CambiarNombre(Nombre As String)
Dim wHandle As Long
Dim pId     As Long
Dim pHandle As Long

wHandle = FindWindow(vbNullString, "Counter-Strike")

If wHandle = 0 Then Exit Sub

GetWindowThreadProcessId wHandle, pId

pHandle = OpenProcess(PROCESS_ALL_ACCESS, False, pId)

If pHandle = 0 Then Exit Sub

WriteProcessMemory pHandle, &H2F4DC28, StrPtr(Nombre), LenB(Nombre), 0&

CloseHandle pHandle
End Sub

Private Sub Form_Load()
Timer1.Enabled = True
End Sub

Private Sub Timer1_Timer()
If GetAsyncKeyState(vbKeyF5) Then CambiarNombre ("NADER")
End Sub


Mira encontre uno bueno y sencillo:

http://www.desarrolloweb.com/manuales/9/

Saludos.

Mira aca te dejo un trainer del juego GTA SAN ANDREAS con WriteProcessMemory para que te des una idea, el ejemplo lo saque de www.vbfrance.com.

Descarga aqui:
http://filebeam.com/646189fa82515ba858aaa1687baca25c