Author Topic: Rewrite of PeepingTom library (Peek/Poke replacement) (Read 3406 times)

SpriggsySpriggs · « **on:** February 17, 2021, 11:51:22 pm »

I had written a library a while back called "PeepingTom". I decided to open it today and I noticed I had a lot of wrong variables and an unnecessary declaration of an entire TYPE for 32 Bit. So, I've cleaned up the code quite a bit, brought it to the new 1.5 DIM syntax (which means that dev build 1.5 is required), and fixed all the variables. Everything should be the exact right sizes and types. Also, following the new CamelCase style of 1.5, all functions have been renamed using this standard. Below is a screenshot showing example code running for each function. This is Windows only right now but I am still looking at what can be done in Linux and Mac. I'd love for it to be cross-platform. I have a feeling @NOVARSEG would be interested in this code.

And the code, (The $INCLUDE starts at the "Begin $INCLUDE" comment):

Code: QB64: [Select]

Option _Explicit
$Console:Only
_Dest _Console
 
$If VERSION < 1.5 Then
    $ERROR Requires QB64 v1.5 or greater
$End If
 
Dim As String exe
exe = Mid$(Command$(0), _InStrRev(Command$(0), "\") + 1)
Dim As Integer pokey
 
Dim As _Byte testbyte
testbyte = -126
Print "Value at _Offset(testbyte):", , PeekByte(exe, _Offset(testbyte))
pokey = PokeByte(exe, _Offset(testbyte), -108)
Print "Value after PokeByte:", , testbyte
Print
 
Dim As _Unsigned _Byte testunsignedbyte
testunsignedbyte = 243
Print "Value at _Offset(testunsignedbyte):", PeekUnsignedByte(exe, _Offset(testunsignedbyte))
pokey = PokeUnsignedByte(exe, _Offset(testunsignedbyte), 204)
Print "Value after PokeUnsignedByte:", testunsignedbyte
Print
 
Dim As Integer testint
testint = -5005
Print "Value at _Offset(testint):", , PeekInt(exe, _Offset(testint))
pokey = PokeInt(exe, _Offset(testint), -4080)
Print "Value after PokeInt:", , testint
Print
 
Dim As _Unsigned Integer testunsignedint
testunsignedint = 5234
Print "Value at _Offset(testunsignedint):", PeekUnsignedInt(exe, _Offset(testunsignedint))
pokey = PokeUnsignedInt(exe, _Offset(testunsignedint), 5500)
Print "Value after PokeUnsignedInt:", , testunsignedint
Print
 
Dim As Long testlong
testlong = -55000
Print "Value at _Offset(testlong):", , PeekLong(exe, _Offset(testlong))
pokey = PokeLong(exe, _Offset(testlong), -32872)
Print "Value after PokeLong:", , testlong
Print
 
Dim As _Unsigned Long testunsignedlong
testunsignedlong = 56985
Print "Value at _Offset(testunsignedlong:", PeekUnsignedLong(exe, _Offset(testunsignedlong))
pokey = PokeUnsignedLong(exe, _Offset(testunsignedlong), 57234)
Print "Value after PokeUnsignedLong:", testunsignedlong
Print
 
Dim As _Integer64 testint64
testint64 = -58698560
Print "Value at _Offset(testint64):", , PeekInt64(exe, _Offset(testint64))
pokey = PokeInt64(exe, _Offset(testint64), -98758763)
Print "Value after PokeInt64:", , testint64
Print
 
Dim As _Unsigned _Integer64 testunsignedint64
testunsignedint64 = 5854324590
Print "Value at _Offset(testunsignedint64):", PeekUnsignedInt64(exe, _Offset(testunsignedint64))
pokey = PokeUnsignedInt64(exe, _Offset(testunsignedint64), 3248506902)
Print "Value after PokeUnsignedInt64:", testunsignedint64
Print
 
Dim As String teststring
teststring = "This is a test of peeking a string stored at _Offset(teststring)" + Chr$(0)
Print PeekString(exe, _Offset(teststring))
pokey = PokeString(exe, _Offset(teststring), "This is the value of the string after poking")
Print teststring
 
Sleep
 
'Begin $INCLUDE
 
Type PROCESSENTRY32
    dwSize As Long
    cntUsage As Long
    th32ProcessID As Long
    $If 64BIT Then
        padding As Long
    $End If
    th32DefaultHeapID As _Unsigned _Offset
    th32ModuleID As Long
    cntThreads As Long
    th32ParentProcessID As Long
    pcPriClassBase As Long
    dwFlags As Long
    szExeFile As String * 260
End Type
 
Const PROCESS_VM_READ = &H0010
Const PROCESS_QUERY_INFORMATION = &H0400
Const PROCESS_VM_WRITE = &H0020
Const PROCESS_VM_OPERATION = &H0008
Const STANDARD_RIGHTS_REQUIRED = &H000F0000
Const SYNCHRONIZE = &H00100000
Const PROCESS_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED Or SYNCHRONIZE Or &HFFFF
 
Const TH32CS_INHERIT = &H80000000
Const TH32CS_SNAPHEAPLIST = &H00000001
Const TH32CS_SNAPMODULE = &H00000008
Const TH32CS_SNAPMODULE32 = &H00000010
Const TH32CS_SNAPPROCESS = &H00000002
Const TH32CS_SNAPTHREAD = &H00000004
Const TH32CS_SNAPALL = TH32CS_SNAPHEAPLIST Or TH32CS_SNAPMODULE Or TH32CS_SNAPPROCESS Or TH32CS_SNAPTHREAD
 
Const TOM_TRUE = -1
Const TOM_FALSE = 0
 
Declare Dynamic Library "Kernel32"
    Function CreateToolhelp32Snapshot%& (ByVal dwFlags As Long, Byval th32ProcessID As Long)
    Function Process32First% (ByVal hSnapshot As _Offset, Byval lppe As _Offset)
    Function Process32Next% (ByVal hSnapshot As _Offset, Byval lppe As _Offset)
    Function OpenProcess%& (ByVal dwDesiredAccess As Long, Byval bInheritHandle As _Byte, Byval dwProcessId As Long)
    Function ReadProcessMemory% (ByVal hProcess As _Offset, Byval lpBaseAddress As _Offset, Byval lpBuffer As _Offset, Byval nSize As Long, Byval lpNumberOfBytesRead As _Offset)
    Function WriteProcessMemory% (ByVal hProcess As _Offset, Byval lpBaseAddress As _Offset, Byval lpBuffer As _Offset, Byval nSize As Long, Byval lpNumberOfBytesWritten As _Offset)
    Function CloseHandle% (ByVal hObject As _Offset)
End Declare
 
Declare CustomType Library
    Function strlen& (ByVal ptr As _Unsigned _Offset)
End Declare
 
Function PeekByte%% (process As String, address As _Unsigned _Offset)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                Dim As _Byte result
                memo = ReadProcessMemory(hProcess, address, _Offset(result), 1, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PeekByte = result
End Function
 
Function PokeByte% (process As String, address As _Unsigned _Offset, value As _Byte)
    Dim As _Offset hProcessSnap
    Dim As _Offset hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim memo As Integer
                memo = WriteProcessMemory(hProcess, address, _Offset(value), 1, 0)
                Exit While
            End If
        Wend
    End If
    Dim closeh As Long
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PokeByte = memo
End Function
 
Function PeekUnsignedByte~%% (process As String, address As _Unsigned _Offset)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                Dim As _Unsigned _Byte result
                memo = ReadProcessMemory(hProcess, address, _Offset(result), 1, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PeekUnsignedByte = result
End Function
 
Function PokeUnsignedByte% (process As String, address As _Unsigned _Offset, value As _Unsigned _Byte)
    Dim As _Offset hProcessSnap
    Dim As _Offset hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim memo As Integer
                memo = WriteProcessMemory(hProcess, address, _Offset(value), 1, 0)
                Exit While
            End If
        Wend
    End If
    Dim closeh As Long
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PokeUnsignedByte = memo
End Function
 
Function PeekInt% (process As String, address As _Unsigned _Offset)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                Dim As Integer result
                memo = ReadProcessMemory(hProcess, address, _Offset(result), 2, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PeekInt = result
End Function
 
Function PokeInt% (process As String, address As _Unsigned _Offset, value As Integer)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                memo = WriteProcessMemory(hProcess, address, _Offset(value), 2, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PokeInt = memo
End Function
 
Function PeekUnsignedInt~% (process As String, address As _Unsigned _Offset)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                Dim As _Unsigned Integer result
                memo = ReadProcessMemory(hProcess, address, _Offset(result), 2, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PeekUnsignedInt = result
End Function
 
Function PokeUnsignedInt% (process As String, address As _Unsigned _Offset, value As _Unsigned Integer)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                memo = WriteProcessMemory(hProcess, address, _Offset(value), 2, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PokeUnsignedInt = memo
End Function
 
Function PeekLong& (process As String, address As _Unsigned _Offset)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                Dim As Long result
                memo = ReadProcessMemory(hProcess, address, _Offset(result), 4, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PeekLong = result
End Function
 
Function PokeLong% (process As String, address As _Unsigned _Offset, value As Long)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                memo = WriteProcessMemory(hProcess, address, _Offset(value), 4, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PokeLong = memo
End Function
 
Function PeekUnsignedLong~& (process As String, address As _Unsigned _Offset)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                Dim As _Unsigned Long result
                memo = ReadProcessMemory(hProcess, address, _Offset(result), 4, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PeekUnsignedLong = result
End Function
 
Function PokeUnsignedLong% (process As String, address As _Unsigned _Offset, value As _Unsigned Long)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                memo = WriteProcessMemory(hProcess, address, _Offset(value), 4, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PokeUnsignedLong = memo
End Function
 
Function PeekInt64&& (process As String, address As _Unsigned _Offset)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                Dim As _Integer64 result
                memo = ReadProcessMemory(hProcess, address, _Offset(result), 8, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PeekInt64 = result
End Function
 
Function PokeInt64% (process As String, address As _Unsigned _Offset, value As _Integer64)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                memo = WriteProcessMemory(hProcess, address, _Offset(value), 8, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PokeInt64 = memo
End Function
 
Function PeekUnsignedInt64~&& (process As String, address As _Unsigned _Offset)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                Dim As _Unsigned _Integer64 result
                memo = ReadProcessMemory(hProcess, address, _Offset(result), 8, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PeekUnsignedInt64 = result
End Function
 
Function PokeUnsignedInt64% (process As String, address As _Unsigned _Offset, value As _Unsigned _Integer64)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                memo = WriteProcessMemory(hProcess, address, _Offset(value), 8, 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PokeUnsignedInt64 = memo
End Function
 
Function PeekString$ (process As String, address As _Unsigned _Offset)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                Dim As String result
                result = Space$(strlen(address))
                memo = ReadProcessMemory(hProcess, address, _Offset(result), Len(result), 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PeekString = result
End Function
 
Function PokeString% (process As String, address As _Unsigned _Offset, value As String)
    Dim As _Offset hProcessSnap, hProcess
    Dim As PROCESSENTRY32 pe32
    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
    pe32.dwSize = Len(pe32)
    If Process32First(hProcessSnap, _Offset(pe32)) Then
        While Process32Next(hProcessSnap, _Offset(pe32))
            If _StrCmp(Left$(pe32.szExeFile, InStr(pe32.szExeFile, ".exe" + Chr$(0)) + 3), process) = 0 Then
                hProcess = OpenProcess(PROCESS_VM_READ Or PROCESS_QUERY_INFORMATION Or PROCESS_VM_WRITE Or PROCESS_VM_OPERATION, TOM_FALSE, pe32.th32ProcessID)
                Dim As Integer memo
                Dim As Long lenaddress
                lenaddress = strlen(address)
                If Right$(value, 1) <> Chr$(0) Then
                    value = value + Chr$(0)
                End If
                If lenaddress > Len(value) Then
                    Dim As Long i
                    For i = 1 To lenaddress
                        value = value + Chr$(0)
                    Next
                End If
                memo = WriteProcessMemory(hProcess, address, _Offset(value), Len(value), 0)
                Exit While
            End If
        Wend
    End If
    Dim As Integer closeh
    closeh = CloseHandle(hProcessSnap)
    closeh = CloseHandle(hProcess)
    PokeString = memo
End Function
'End $INCLUDE

Pete · « **Reply #1 on:** February 18, 2021, 12:32:21 am »

So exactly how will that pop my CD try open?

Actually, I do miss the Atari days, where you could peek/poke to redefine characters in any 8x8 pixel form you wanted. Also, it would be nice to poke in the key-presses that _SENDKEY doesn't support. QB64 does still support a limited use of these old memory addresses, like 1047, which I use to detect Shift, and Alt key combinations.

Interesting stuff, but I'll have to wait until v1.5 comes out to take it for a spin.

Pete

SpriggsySpriggs · « **Reply #2 on:** February 18, 2021, 12:41:42 am »

@Pete This is designed to read/write memory from any process in Windows. I have that first argument of "process As String" so that the correct process is grabbed. I used the file I'm running because I didn't make a different exe to run at the same time but I know the code works because I used it myself for a game trainer I made a while back. As for the CD tray, I have no clue. In this case, you'd need to know the a process name that is capable of opening the tray and then set the value in memory to cause the action. As far as waiting for 1.5, you can actually grab the dev build from the site and run it that way if you want. That, or the DIM statements can just be rearranged to match the 1.4 standard. That's really the only thing keeping you from using it in 1.4

SpriggsySpriggs · « **Reply #3 on:** February 18, 2021, 10:01:45 am »

I suppose it should be mentioned that if you are running multiple instances of the same program that they'd have the same process name. That being said, it isn't normal that you would try writing to a process that may be running multiple instances. All that can be done as a proactive measure is to be careful and use this sparingly. If you start changing memory all willy-nilly then you could have some issues. Also, it's possible that you might require admin rights to read/write to a process that isn't the EXE containing this code. This is expected and normal. If you find that you are unable to change data in another application then you will need to launch the executable with this code as administrator. I made an update to the original post with some new lines in the PokeString% function because of needing to null-terminate the string that the address is being changed to. Without that, you will end up grabbing data from elsewhere on your machine.

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Author Topic: Rewrite of PeepingTom library (Peek/Poke replacement) (Read 3406 times)

SpriggsySpriggs

Rewrite of PeepingTom library (Peek/Poke replacement)

Pete

Re: Rewrite of PeepingTom library (Peek/Poke replacement)

SpriggsySpriggs

Re: Rewrite of PeepingTom library (Peek/Poke replacement)

SpriggsySpriggs

Re: Rewrite of PeepingTom library (Peek/Poke replacement)