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  1. #1
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    How to Read and Write to the Process Memory

    Create new Class
    This is The MemoryWrite / Read Class
    using System;
    using System.Diagnostics;
    using System.Management;
    using System.Runtime.InteropServices;

    namespace ProcessMemoryReaderLib
    /// <summary>
    /// </summary>
    class ProcessMemoryReaderApi
    public enum ProcessAccessType
    PROCESS_TERMINATE = (0x0001),
    PROCESS_VM_OPERATION = (0x0008),
    PROCESS_VM_READ = (0x0010),
    PROCESS_VM_WRITE = (0x0020),
    PROCESS_DUP_HANDLE = (0x0040),
    PROCESS_SET_QUOTA = (0x0100),

    public static extern IntPtr OpenProcess(UInt32 dwDesiredAccess, Int32 bInheritHandle, UInt32 dwProcessId);

    public static extern Int32 CloseHandle(IntPtr hObject);

    public static extern Int32 ReadProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, [In, Out] byte[] buffer, UInt32 size, out IntPtr lpNumberOfBytesRead);

    public static extern Int32 WriteProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, [In, Out] byte[] buffer, UInt32 size, out IntPtr lpNumberOfBytesWritten);


    public class ProcessMemoryReader

    public ProcessMemoryReader()

    /// <summary>
    /// </summary>
    public Process ReadProcess
    return m_ReadProcess;
    m_ReadProcess = value;

    private Process m_ReadProcess = null;

    private IntPtr m_hProcess = IntPtr.Zero;

    public void OpenProcess()
    ProcessMemoryReaderApi.ProcessAccessType access;
    access = ProcessMemoryReaderApi.ProcessAccessType.PROCESS_V M_READ
    | ProcessMemoryReaderApi.ProcessAccessType.PROCESS_V M_WRITE
    | ProcessMemoryReaderApi.ProcessAccessType.PROCESS_V M_OPERATION;
    m_hProcess = ProcessMemoryReaderApi.OpenProcess((uint)access, 1, (uint)m_ReadProcess.Id);

    public void CloseHandle()
    int iRetValue;
    iRetValue = ProcessMemoryReaderApi.CloseHandle(m_hProcess);
    if (iRetValue == 0)
    throw new Exception("closehandle failed");

    public byte[] ReadProcessMemory(IntPtr MemoryAddress, uint bytesToRead, out int bytesRead)
    byte[] buffer = new byte[bytesToRead];

    IntPtr ptrBytesRead;
    ProcessMemoryReaderApi.ReadProcessMemory(m_hProces s, MemoryAddress, buffer, bytesToRead, out ptrBytesRead);

    bytesRead = ptrBytesRead.ToInt32();

    return buffer;

    public void WriteProcessMemory(IntPtr MemoryAddress, byte[] bytesToWrite, out int bytesWritten)
    IntPtr ptrBytesWritten;
    ProcessMemoryReaderApi.WriteProcessMemory(m_hProce ss, MemoryAddress, bytesToWrite, (uint)bytesToWrite.Length, out ptrBytesWritten);

    bytesWritten = ptrBytesWritten.ToInt32();


    Now Go to your Form
    public partial class FormName : Form 
    add this
    ProcessMemoryReaderLib.ProcessMemoryReader preader = new ProcessMemoryReaderLib.ProcessMemoryReader();
    Now you can Write the Memory Like This
    System.Diagnostics.Process[] MS = System.Diagnostics.Process.GetProcessesByName("SomeGame");
                    if (MS.Length != 0)
                        preader.ReadProcess = MS[0];
                        int thosewrote;
                        byte[] vals = { 0x0F, 0x84, 0xF1, 0x20, 0x00, 0x00 };
                        preader.WriteProcessMemory((IntPtr)0x009343FC, vals , out thosewrote);
    Bytes to Write = 0F & 84 & F1 & 20 & 00 & 00
    The Address that will it be wrote to = 009343FC

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