Originally Posted by master131
Someone originally asked me about how to write a float to memory and when he gave me his code, I immediately facepalmed since the decleration for WriteProcessMemory and ReadProcessMemory were completely wrong. I know it's not his fault because he probably copied from somewhere but here's my take on it.
It supports ANY 'primitive' value type, the most common one you guys will be using is probably: Integer, Single (Float) and String (string is not a primitive type but it's still supported). You can also read Byte() too (byte array), make sure to indicate how many bytes you want to read though.
Here's a full list if you're interested: Boolean, Byte, SByte, Int16 (Short), UInt16 (UShort), Int32 (Integer), UInt32 (UInteger), Int64 (Long), UInt64 (ULong), IntPtr, UIntPtr, Char, Double, and Single (Float).
Here's the code:
How do I use the code?
Right-click on your project and Add a new module. Then copy and paste the code from the box into the screen. If you want to use this module on another process, replace "iw5sp" with whatever you want next to 'TargetProcess'.
I've created a few functions for you guys. To check if a process is running, use the UpdateProcessHandle() function. For example (in a timer):
Now, here's how to read/write memory using this module:
Dim myIntValue As Integer = ReadMemory(Of Integer)(&H12345678) ' Reads the value from 0x12345678 as an Integer
Dim myFloatValue As Single = ReadMemory(Of Single)(&H12345678) ' Reads the value from 0x12345678 as a Single (remember that Single is the same as Float)
Dim myASCIIStringValue As String = ReadMemory(Of String)(&H12345678, 10, False) ' Reads 10 characters at 0x12345678 as a ASCII String
Dim myUnicodeStringValue As String = ReadMemory(Of String)(&H12345678, 10, True) ' Reads 10 characters at 0x12345678 as a Unicode String
Dim myByteData() As Byte = ReadMemory(&H12345678, 12) ' Reads 12 bytes from 0x12345678
WriteMemory(&H12345678, 10I) ' Writes 10 as an Integer to 0x12345678, take note of the I at the end (it's optional but you can put it there just incase)
WriteMemory(&H12345678, 0.5F) ' Writes 0.5 as a Single to 0x12345678, take note of the F at the end! (you MUST do this or it will assume it's a Double!)
WriteMemory(&H12345678, "Hello World", False) ' Writes Hello World as an ASCII string to 0x12345678
WriteMemory(&H12345678, "Hello World", True) ' Writes Hello World as a Unicode string to 0x12345678
WriteMemory(&H12345678, New Byte() { &H90, &H90, &H90, &H90 }) ' Writes '0x90, 0x90, 0x90, 0x90' as a byte array to 0x12345678
How do I write a number into memory if I'm going to get it from a text box?
It is extremely important that you let VB.NET know what type you want to write into memory otherwise it may assume and you might get some nasty results, here's how you can do it:
However, if you are 100% sure that whatever inside a box is a number and not letters you can do this:
What's the difference between a ASCII and Unicode string?
Unicode strings use 2 bytes for every letter it uses and ASCII only uses 1 byte for every letter. If you find a string in memory with Cheat Engine with the Unicode box unticked then it's a ASCII string. If the Unicode box is ticked then it's a Unicode string.
It supports ANY 'primitive' value type, the most common one you guys will be using is probably: Integer, Single (Float) and String (string is not a primitive type but it's still supported). You can also read Byte() too (byte array), make sure to indicate how many bytes you want to read though.
Here's a full list if you're interested: Boolean, Byte, SByte, Int16 (Short), UInt16 (UShort), Int32 (Integer), UInt32 (UInteger), Int64 (Long), UInt64 (ULong), IntPtr, UIntPtr, Char, Double, and Single (Float).
Here's the code:
Code:
Option Strict On
Imports System.Runtime.InteropServices
Imports System.Text
Module MemoryModule
<DllImport("kernel32.dll")> _
Private Function OpenProcess(ByVal dwDesiredAccess As UInteger, <MarshalAs(UnmanagedType.Bool)> ByVal bInheritHandle As Boolean, ByVal dwProcessId As Integer) As IntPtr
End Function
<DllImport("kernel32.dll", SetLastError:=True)> _
Private Function WriteProcessMemory(ByVal hProcess As IntPtr, ByVal lpBaseAddress As IntPtr, ByVal lpBuffer As Byte(), ByVal nSize As IntPtr, <Out()> ByRef lpNumberOfBytesWritten As IntPtr) As Boolean
End Function
<DllImport("kernel32.dll", SetLastError:=True)> _
Private Function ReadProcessMemory(ByVal hProcess As IntPtr, ByVal lpBaseAddress As IntPtr, <Out()> ByVal lpBuffer() As Byte, ByVal dwSize As IntPtr, ByRef lpNumberOfBytesRead As IntPtr) As Boolean
End Function
<DllImport("kernel32.dll", SetLastError:=True)>
Private Function CloseHandle(ByVal hObject As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
Private Const PROCESS_VM_WRITE As UInteger = &H20
Private Const PROCESS_VM_READ As UInteger = &H10
Private Const PROCESS_VM_OPERATION As UInteger = &H8
Private Const TargetProcess As String = "iw5sp"
Private ProcessHandle As IntPtr = IntPtr.Zero
Private LastKnownPID As Integer = -1
Public Function ReadMemory(Of T)(ByVal address As Integer) As T
Return ReadMemory(Of T)(address, 0, False)
End Function
Public Function ReadMemory(ByVal address As Integer, ByVal length As Integer) As Byte()
Return ReadMemory(Of Byte())(address, length, False)
End Function
Private Function ProcessIDExists(ByVal pID As Integer) As Boolean
For Each p As Process In Process.GetProcessesByName(TargetProcess)
If p.ID = pID Then Return True
Next
Return False
End Function
Private Function UpdateProcessHandle() As Boolean
If LastKnownPID = -1 OrElse Not ProcessIDExists(LastKnownPID) Then
If ProcessHandle <> IntPtr.Zero Then CloseHandle(ProcessHandle)
Dim p() As Process = Process.GetProcessesByName(TargetProcess)
If p.Length = 0 Then Return False
LastKnownPID = p(0).Id
ProcessHandle = OpenProcess(PROCESS_VM_READ Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, False, p(0).Id)
If ProcessHandle = IntPtr.Zero Then Return False
End If
Return True
End Function
Public Function ReadMemory(Of T)(ByVal address As Integer, ByVal length As Integer, ByVal unicodeString As Boolean) As T
Dim buffer() As Byte
If GetType(T) Is GetType(String) Then
If unicodeString Then buffer = New Byte(length * 2 - 1) {} Else buffer = New Byte(length - 1) {}
ElseIf GetType(T) Is GetType(Byte()) Then
buffer = New Byte(length - 1) {}
Else
buffer = New Byte(Marshal.SizeOf(GetType(T)) - 1) {}
End If
If Not UpdateProcessHandle() Then Return Nothing
Dim success As Boolean = ReadProcessMemory(ProcessHandle, New IntPtr(address), buffer, New IntPtr(buffer.Length), IntPtr.Zero)
If Not success Then Return Nothing
If GetType(T) Is GetType(Byte()) Then Return CType(CType(buffer, Object), T)
Dim gcHandle As GCHandle = gcHandle.Alloc(buffer, GCHandleType.Pinned)
Dim returnObject As T
returnObject = CType(Marshal.PtrToStructure(gcHandle.AddrOfPinnedObject, GetType(T)), T)
gcHandle.Free()
Return returnObject
End Function
Private Function GetObjectBytes(ByVal value As Object) As Byte()
If value.GetType() Is GetType(Byte()) Then Return CType(value, Byte())
Dim buffer(Marshal.SizeOf(value) - 1) As Byte
Dim ptr As IntPtr = Marshal.AllocHGlobal(buffer.Length)
Marshal.StructureToPtr(value, ptr, True)
Marshal.Copy(ptr, buffer, 0, buffer.Length)
Marshal.FreeHGlobal(ptr)
Return buffer
End Function
Public Function WriteMemory(ByVal address As Integer, ByVal value As Object) As Boolean
Return WriteMemory(address, value, False)
End Function
Public Function WriteMemory(ByVal address As Integer, ByVal value As Object, ByVal unicode As Boolean) As Boolean
If Not UpdateProcessHandle() Then Return False
Dim buffer() As Byte
If TypeOf value Is String Then
If unicode Then buffer = Encoding.Unicode.GetBytes(value.ToString()) Else buffer = Encoding.ASCII.GetBytes(value.ToString())
Else
buffer = GetObjectBytes(value)
End If
Dim result As Boolean = WriteProcessMemory(ProcessHandle, New IntPtr(address), buffer, New IntPtr(buffer.Length), IntPtr.Zero)
Return result
End Function
End Module
Right-click on your project and Add a new module. Then copy and paste the code from the box into the screen. If you want to use this module on another process, replace "iw5sp" with whatever you want next to 'TargetProcess'.
I've created a few functions for you guys. To check if a process is running, use the UpdateProcessHandle() function. For example (in a timer):
Code:
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
If UpdateProcessHandle() Then ' Check if the game is running
' Do stuff here, like writing/reading memory or telling a user in a Label the game is open.
End If
End Sub
Dim myIntValue As Integer = ReadMemory(Of Integer)(&H12345678) ' Reads the value from 0x12345678 as an Integer
Dim myFloatValue As Single = ReadMemory(Of Single)(&H12345678) ' Reads the value from 0x12345678 as a Single (remember that Single is the same as Float)
Dim myASCIIStringValue As String = ReadMemory(Of String)(&H12345678, 10, False) ' Reads 10 characters at 0x12345678 as a ASCII String
Dim myUnicodeStringValue As String = ReadMemory(Of String)(&H12345678, 10, True) ' Reads 10 characters at 0x12345678 as a Unicode String
Dim myByteData() As Byte = ReadMemory(&H12345678, 12) ' Reads 12 bytes from 0x12345678
WriteMemory(&H12345678, 10I) ' Writes 10 as an Integer to 0x12345678, take note of the I at the end (it's optional but you can put it there just incase)
WriteMemory(&H12345678, 0.5F) ' Writes 0.5 as a Single to 0x12345678, take note of the F at the end! (you MUST do this or it will assume it's a Double!)
WriteMemory(&H12345678, "Hello World", False) ' Writes Hello World as an ASCII string to 0x12345678
WriteMemory(&H12345678, "Hello World", True) ' Writes Hello World as a Unicode string to 0x12345678
WriteMemory(&H12345678, New Byte() { &H90, &H90, &H90, &H90 }) ' Writes '0x90, 0x90, 0x90, 0x90' as a byte array to 0x12345678
How do I write a number into memory if I'm going to get it from a text box?
It is extremely important that you let VB.NET know what type you want to write into memory otherwise it may assume and you might get some nasty results, here's how you can do it:
Code:
Dim valueToWrite As Integer
If Integer.TryParse(TextBox1.Text, valueToWrite) Then ' Try to convert the text into an Integer
WriteMemory(&H12345678, valueToWrite)
End If
Dim floatValueToWrite As Single
If Single.TryParse(TextBox2.Text, valueToWrite) Then ' Try convert the text into a Single
WriteMemory(&H12345678, floatValueToWrite)
End If
Code:
WriteMemory(&H12345678, CInt(TextBox1.Text)) ' Writes the value inside a TextBox as a Integer WriteMemory(&H12345678, CSng(TextBox2.Text)) ' Writes the value inside a TextBox as a Single
Unicode strings use 2 bytes for every letter it uses and ASCII only uses 1 byte for every letter. If you find a string in memory with Cheat Engine with the Unicode box unticked then it's a ASCII string. If the Unicode box is ticked then it's a Unicode string.
Still, it do look very alike the one that was posted a long time ago here. (Page 2 in tutorials I think...)
