Changing Hex Value

I was attempting to create a little program that would change ONE hex value of a specific program to a certain value, but don't really know how to do it. Could someone give me an example code with a button or something? Thanks in advance!

 

Like a memory editor?

 

I made one of these in Java a few weeks ago(I was bored, Lol). Unfinished, and not too sure if it'll be much help to you (Java isn't very much like vB), but here's the download. NOTE: It's not the nicest program (kinda sloppy), but it works (somewhat). You get the idea,

http://rapidshare.de/files/47966377/Hex_Editor.zip.html

 

You want to edit the actual file or the memory?

 

Add this to your module... Code is not by me

Code:

Public Const PROCESS_ALL_ACCESS = &H1F0FFF
Dim f1holder As Integer
Dim timer_pos As Long

Public Declare Function GetWindowThreadProcessId Lib "user32" (ByVal SomeValueIsStoredHere As Long, lpdwProcessId As Long) As Long
Public Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Public Declare Function WriteProcessMemory Lib "kernel32" (ByVal hProcess As Long, ByVal lpBaseAddress As Any, lpBuffer As Any, ByVal nSize As Long, lpNumberOfBytesWritten As Long) As Long
Public Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Public Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal Classname As String, ByVal WindowName As String) As Long
Public Declare Function GetKeyPress Lib "user32" Alias "GetAsyncKeyState" (ByVal key As Long) As Integer
Public Declare Function ReadProcessMem Lib "kernel32" Alias "ReadProcessMemory" (ByVal hProcess As Long, ByVal lpBaseAddress As Any, ByRef lpBuffer As Any, ByVal nSize As Long, lpNumberOfBytesWritten As Long) As Long

Public Function WriteALong(TheGame As String, TheAddress As Long, ThisIsTheValue As Long)
Dim SomeValueIsStoredHere As Long
Dim SomeValueIsStoredHereToo As Long
Dim SomeValue As Long
SomeValueIsStoredHere = FindWindow(vbNullString, TheGame)
GetWindowThreadProcessId SomeValueIsStoredHere, SomeValueIsStoredHereToo
SomeValue = OpenProcess(PROCESS_ALL_ACCESS, False, SomeValueIsStoredHereToo)
If (SomeValue = 0) Then
    Exit Function
End If
WriteProcessMemory SomeValue, TheAddress, ThisIsTheValue, 4, 0&
CloseHandle hProcess
End Function

Public Function ReadALong(TheGame As String, TheAddress As Long, TheValue As Long)
Dim SomeValueIsStoredHere As Long
Dim SomeValueIsStoredHereToo As Long
Dim SomeValue As Long
SomeValueIsStoredHere = FindWindow(vbNullString, TheGame)
GetWindowThreadProcessId SomeValueIsStoredHere, SomeValueIsStoredHereToo
SomeValue = OpenProcess(PROCESS_ALL_ACCESS, False, SomeValueIsStoredHereToo)
If (SomeValue = 0) Then
    Exit Function
End If
ReadProcessMem SomeValue, TheAddress, TheValue, 4, 0&
CloseHandle hProcess
End Function

 

Public Function ReadAFloat(TheGame As String, TheAddress As Long, TheValue As Single)
Dim SomeValueIsStoredHere As Long
Dim SomeValueIsStoredHereToo As Long
Dim SomeValue As Long
SomeValueIsStoredHere = FindWindow(vbNullString, TheGame)
GetWindowThreadProcessId SomeValueIsStoredHere, SomeValueIsStoredHereToo
SomeValue = OpenProcess(PROCESS_ALL_ACCESS, False, SomeValueIsStoredHereToo)
If (SomeValue = 0) Then
    Exit Function
End If
ReadProcessMem SomeValue, TheAddress, TheValue, 4, 0&
CloseHandle hProcess
End Function

 

Public Function WriteAFloat(TheGame As String, TheAddress As Long, ThisIsTheValue As Single)
Dim SomeValueIsStoredHere As Long
Dim SomeValueIsStoredHereToo As Long
Dim SomeValue As Long
SomeValueIsStoredHere = FindWindow(vbNullString, TheGame)
GetWindowThreadProcessId SomeValueIsStoredHere, SomeValueIsStoredHereToo
SomeValue = OpenProcess(PROCESS_ALL_ACCESS, False, SomeValueIsStoredHereToo)
If (SomeValue = 0) Then
    Exit Function
End If
WriteProcessMemory SomeValue, TheAddress, ThisIsTheValue, 4, 0&
CloseHandle hProcess
End Function

Original Code by Diamondo25

Get your HEX code with cheat engine... I hope you know how to do this.. If not reply and i will show you how.

Use this in your form

&HA00000 = HEX CODE
999999 = VALUE TO CHANGE TO

Code:

Call WriteALong("TITLE OF APP", &HA00000, 99)

There are TONS more functions in that module.. look at em