学习c++ （一） dll注入和进程间通信

一直觉得学c++太 复杂了，里面很多类型，多得根本分不清，但网上资料很多是c++的，有些问题又用其它的解决不完美(会c#、java、python)

然后还是下决定搞一搞，因为搞c++，又不得不搞VC++，还得看看MFC，这花了我三天时间，看得累，光是不同类型之间的转换就查了不少资料

好吧，开始搞dll注入，拿记事本开刀，用c#和easyhook轻易的就搞定了，一个注入程序，一个被注入dll

然后折腾c++，注入进去了还要跟主程序通信，然后就一起弄了一下，确实伤神，主要还是类型之间的问题，如果是相对于新手，网上大部分的资料都写得太粗了，完全不知道变量的类型是什么

我就贴一下完整代码，首先是先写一个dll，用的c++写的，准备注入到记事本中去的，这个dll新建比较容易，我用vs2015，直接建个c++的空项目，加一个cpp的文件开始写就可以了，我也不敢说新手会不会加，但我现在是会了，所以只能描述一下了，代码有些注释了，打开了无妨，主要功能就是被注入后，向主进程（窗口标题为MFC3)发送WM_COPYDATA消息hello world

那个COPYDATASTRUCT结构体搞了我一天的时间，最后不断拼出来的代码，网上大多是MFC的，但我就是想用C++弄出来

//#include "stdafx.h";

#include <iostream>;
using namespace std;
#include <windows.h>;
#include <tlhelp32.h>;
#include <tchar.h>;

BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam);
HWND GetMainWindow();
void MyPostMessage(HWND hWnd);

DWORD WINAPI MyThreadProc1( LPVOID pParam );
DWORD WINAPI MyThreadProc2( LPVOID pParam );



BOOL APIENTRY DllMain( HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
    switch ( ul_reason_for_call )
    {
    case DLL_PROCESS_ATTACH:
{
    MessageBox( NULL, "DLL已进入目标进程。", "信息", MB_ICONINFORMATION );
        DWORD dwThreadId;
        HANDLE myThread1 = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)MyThreadProc1, NULL, 0, &dwThreadId);
        HANDLE myThread2 = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)MyThreadProc2, NULL, 0, &dwThreadId);
        break;
}
    case DLL_PROCESS_DETACH:
    {
        MessageBox( NULL, "DLL已从目标进程卸载。", "信息", MB_ICONINFORMATION );
            break;
    }
    }
return TRUE;
}
DWORD WINAPI MyThreadProc1( LPVOID pParam )
{
    MessageBox( NULL, "DLL已进入线程1.", "信息", MB_ICONINFORMATION );
    return 0;
}
DWORD WINAPI MyThreadProc2( LPVOID pParam )
{
    //MessageBox( NULL, "DLL已进入线程2.", "信息", MB_ICONINFORMATION );
    //HWND hWnd = GetMainWindow();
    //if (hWnd)
    //    hWnd = ::FindWindowEx(hWnd, 0, TEXT("EDIT"), NULL);
    //if (hWnd)
    //{
    //    //MessageBox(hWnd, TEXT("开始注入"), TEXT("提示"), MB_OK);
    //    MyPostMessage(hWnd);
    //}
    //else
    //{
    //    MessageBox(hWnd, TEXT("记事本不存在"), TEXT("提示"), MB_OK);
    //}

 
    const char szDlgTitle[] = "MFC3";
    string  m_msg =  "hello world 
" ;
 
    HWND  pWnd = ::FindWindow(NULL, szDlgTitle);
    
    if (pWnd)
    {
        string strData = "hello world";
        COPYDATASTRUCT CopyData;
        CopyData.dwData = 0;
        CopyData.cbData = strData.size() + 1;
        CopyData.lpData = (void*)strData.c_str();

        SendMessage(pWnd, WM_COPYDATA, 0, (LPARAM)&CopyData);


    }
    else
        MessageBox(NULL, "No such Things.。", "信息", MB_ICONINFORMATION);
 


    return 0;
}

BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam)
{
    DWORD dwCurProcessId = *((DWORD*)lParam);
    DWORD dwProcessId = 0;

    GetWindowThreadProcessId(hwnd, &dwProcessId);
    if (dwProcessId == dwCurProcessId && GetParent(hwnd) == NULL)
    {
        *((HWND *)lParam) = hwnd;
        return FALSE;
    }
    return TRUE;
}


HWND GetMainWindow()
{
    DWORD dwCurrentProcessId = GetCurrentProcessId();
    if (!EnumWindows(EnumWindowsProc, (LPARAM)&dwCurrentProcessId))
    {
        return (HWND)dwCurrentProcessId;
    }
    return NULL;
}


void MyPostMessage(HWND hWnd)
{
    for (int i = 0; i < 25; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    PostMessageW(hWnd, WM_CHAR, L']', 1);
    PostMessageW(hWnd, WM_CHAR, L']', 1);
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 33; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    for (int i = 0; i < 7; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    PostMessageW(hWnd, WM_CHAR, L']', 1);
    PostMessageW(hWnd, WM_CHAR, L']', 1);
    PostMessageW(hWnd, WM_CHAR, L']', 1);
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 17; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 16; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    for (int i = 0; i < 15; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L']', 1);
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 23; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    PostMessageW(hWnd, WM_CHAR, L']', 1);
    for (int i = 0; i < 19; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L']', 1);
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 13; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 12; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L']', 1);
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    for (int i = 0; i < 24; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 15; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 27; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L']', 1);
    for (int i = 0; i < 10; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 9; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 31; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 11; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 31; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 8; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 7; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 35; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 7; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 35; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 6; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 5; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 39; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 39; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 4; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 3; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 87; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 89; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    for (int i = 0; i < 90; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L'=', 1);
    for (int i = 0; i < 91; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    PostMessageW(hWnd, WM_CHAR, L'=', 1);
    for (int i = 0; i < 93; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 94; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    PostMessageW(hWnd, WM_CHAR, L'=', 1);
    for (int i = 0; i < 93; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    PostMessageW(hWnd, WM_CHAR, L'=', 1);
    for (int i = 0; i < 93; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    PostMessageW(hWnd, WM_CHAR, L'=', 1);
    for (int i = 0; i < 93; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 93; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    for (int i = 0; i < 93; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 92; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L'=', 1);
    for (int i = 0; i < 90; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'^', 1);
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 3; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 88; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 4; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    for (int i = 0; i < 88; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 4; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 86; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L' ', 1);
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 5; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 84; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 3; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 7; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 80; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    for (int i = 0; i < 5; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 8; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 78; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 6; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 9; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 76; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 7; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 11; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 72; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    for (int i = 0; i < 9; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 12; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'=', 1);
    for (int i = 0; i < 70; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'^', 1);
    for (int i = 0; i < 10; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 13; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 67; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 11; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 15; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 64; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 13; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 17; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 60; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    for (int i = 0; i < 15; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 18; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 58; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 16; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 20; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 54; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 18; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 22; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 50; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 20; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 24; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 46; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 22; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 26; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 42; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 24; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 28; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 37; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 26; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 30; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 32; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'[', 1);
    for (int i = 0; i < 29; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 33; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 27; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 31; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 36; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 22; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 34; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 39; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 16; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'[', 1);
    for (int i = 0; i < 37; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 42; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    for (int i = 0; i < 10; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'/', 1);
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    for (int i = 0; i < 39; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 44; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L',', 1);
    for (int i = 0; i < 6; i++) {
        PostMessageW(hWnd, WM_CHAR, L'O', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 42; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
    for (int i = 0; i < 46; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'.', 1);
    PostMessageW(hWnd, WM_CHAR, L'\', 1);
    PostMessageW(hWnd, WM_CHAR, L'O', 1);
    PostMessageW(hWnd, WM_CHAR, L'`', 1);
    for (int i = 0; i < 44; i++) {
        PostMessageW(hWnd, WM_CHAR, L' ', 1);
    }
    PostMessageW(hWnd, WM_CHAR, L'
', 1);
}

再来说注入程序，用的MFC做的，开始完全跟c++搞混了，蒙了，一点一点来吧，找入门教程把窗口show出来，有几点说一下

#include <tlhelp32.h>;
#include <windows.h>;

这个导入一定要放在后面一点，要不会报错，说windows.h  已经被导入过一次了

在BEGIN_MESSAGE_MAP 中注册一下事件ON_WM_COPYDATA()，然后才能写后面的代码

受c#的影响，以为控件的name直接是可以在代码中用的，但MFC是要添加变量的，在控件上右键添加变量，然后才能在代码中用这个变量使用控件

MFC比c#这种使用起来的方便性，差了不是一点点，光就是如何建立一个只有窗体的项目，就研究了N久，在MFC的项目向导中，在程序类型记得选基于对话框，要不出来的一堆东西

用C++是可以写窗体的，但真的比MFC还要麻烦，不过我会尝试一下的！，整个主窗口的代码如下：

// MFC3Dlg.cpp : 实现文件
//
#include <iostream>;
//using namespace std;

//#include <tchar.h>;



#include "stdafx.h"
#include "MFC3.h"
#include "MFC3Dlg.h"
#include "afxdialogex.h"

#include <tlhelp32.h>;
#include <windows.h>;



#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CMFC3Dlg 对话框



CMFC3Dlg::CMFC3Dlg(CWnd* pParent /*=NULL*/)
    : CDialogEx(IDD_MFC3_DIALOG, pParent)
    , frmA(0)
{
    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMFC3Dlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
    DDX_Control(pDX, IDC_EDIT1, m_editMultiLine);
}

BEGIN_MESSAGE_MAP(CMFC3Dlg, CDialogEx)
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
    ON_BN_CLICKED(IDC_BUTTON1, &CMFC3Dlg::OnBnClickedButton1)
    ON_BN_CLICKED(IDC_BUTTON2, &CMFC3Dlg::OnBnClickedButton2)
    ON_WM_COPYDATA()
    ON_BN_CLICKED(IDC_BUTTON3, &CMFC3Dlg::OnBnClickedButton3)
END_MESSAGE_MAP()


// CMFC3Dlg 消息处理程序

BOOL CMFC3Dlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();

    // 设置此对话框的图标。  当应用程序主窗口不是对话框时，框架将自动
    //  执行此操作
    SetIcon(m_hIcon, TRUE);            // 设置大图标
    SetIcon(m_hIcon, FALSE);        // 设置小图标

    // TODO: 在此添加额外的初始化代码

    return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE
}

// 如果向对话框添加最小化按钮，则需要下面的代码
//  来绘制该图标。  对于使用文档/视图模型的 MFC 应用程序，
//  这将由框架自动完成。

void CMFC3Dlg::OnPaint()
{
    if (IsIconic())
    {
        CPaintDC dc(this); // 用于绘制的设备上下文

        SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

        // 使图标在工作区矩形中居中
        int cxIcon = GetSystemMetrics(SM_CXICON);
        int cyIcon = GetSystemMetrics(SM_CYICON);
        CRect rect;
        GetClientRect(&rect);
        int x = (rect.Width() - cxIcon + 1) / 2;
        int y = (rect.Height() - cyIcon + 1) / 2;

        // 绘制图标
        dc.DrawIcon(x, y, m_hIcon);
    }
    else
    {
        CDialogEx::OnPaint();
    }
}

//当用户拖动最小化窗口时系统调用此函数取得光标
//显示。
HCURSOR CMFC3Dlg::OnQueryDragIcon()
{
    return static_cast<HCURSOR>(m_hIcon);
}



void CMFC3Dlg::OnBnClickedButton1()
{
    // TODO: 在此添加控件通知处理程序代码
    CString  Cedit = _T("hello world 
");
     
    AfxGetMainWnd()->SetWindowText(L"你的标题");
    CString c2;
    m_editMultiLine.GetWindowTextW(c2);
    m_editMultiLine.SetWindowTextW ( c2+ Cedit);
    UpdateData(FALSE);     
    m_editMultiLine.LineScroll(m_editMultiLine.GetLineCount() - 1, 0);

}


void CMFC3Dlg::OnBnClickedButton2()
{
    // TODO: 在此添加控件通知处理程序代码
    CString str =_T( "MFC3");
    CString  m_msg=_T("hello world 
");
        CWnd * pWnd = CWnd::FindWindow(NULL, str);
    UpdateData(TRUE);
    if (pWnd)
    {
        COPYDATASTRUCT cpd;
        cpd.dwData = 0;
        cpd.cbData = m_msg.GetLength();
        cpd.lpData = (void*)str.GetBuffer(cpd.cbData);

        pWnd->SendMessage(WM_COPYDATA, 0, (LPARAM)&cpd);
        str.ReleaseBuffer();
    }
    else
        MessageBox(_T("No such Things."));
 
}

BOOL CMFC3Dlg::OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct)
{
 
     std::string str = (char*)pCopyDataStruct->lpData;
 
    CString c2;
    m_editMultiLine.GetWindowTextW(c2);
    c2 += "
";
    c2+=  str.c_str() ;

    m_editMultiLine.SetWindowTextW(c2);
 
    return CDialog::OnCopyData(pWnd, pCopyDataStruct);

}



// 提升进程访问权限
bool enableDebugPriv()
{
    HANDLE hToken;
    LUID sedebugnameValue;
    TOKEN_PRIVILEGES tkp;
    if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)
        )
    {
        return false;
    }
    if (!LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &sedebugnameValue))
    {
        CloseHandle(hToken);
        return false;
    }
    tkp.PrivilegeCount = 1;
    tkp.Privileges[0].Luid = sedebugnameValue;
    tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
    if (!AdjustTokenPrivileges(hToken, FALSE, &tkp, sizeof(tkp), NULL, NULL))
    {
        CloseHandle(hToken);
        return false;
    }
    return true;
}
// 根据进程名称得到进程ID,如果有多个运行实例的话,返回第一个枚举到的进程的ID
DWORD processNameToId(LPCTSTR lpszProcessName)
{ 
    HANDLE hSnapshot = CreateToolhelp32Snapshot (TH32CS_SNAPPROCESS, 0);
    PROCESSENTRY32 pe;
    pe.dwSize = sizeof(PROCESSENTRY32); 
    if (!Process32First(hSnapshot, &pe))
    {
        MessageBox(NULL,
            L"The frist entry of the process list has not been copyied to the buffer",
            L"Notice",
            MB_ICONINFORMATION | MB_OK
        );
        return 0;
    }
    while (Process32Next(hSnapshot, &pe))
    {
        if (!wcscmp(lpszProcessName,   pe.szExeFile ))
        {
            return pe.th32ProcessID;
        }
    }
    return 0;
}
LPCWSTR stringToLPCWSTR(std::string orig)
{
    size_t origsize = orig.length() + 1;
    const size_t newsize = 100;
    size_t convertedChars = 0;
    wchar_t *wcstring = (wchar_t *)malloc(sizeof(wchar_t) *(orig.length() - 1));
    mbstowcs_s(&convertedChars, wcstring, origsize, orig.c_str(), _TRUNCATE);
    return wcstring;
}

int dll_inject()
{
    // 定义线程体的大小
    const DWORD dwThreadSize = 5 * 1024;
    DWORD dwWriteBytes;
    // 提升进程访问权限
    //enableDebugPriv();
    // 等待输入进程名称,注意大小写匹配
    //std::cout << "Please input the name of target process !" << std::endl;
    //LPCTSTR szExeName = "notepad.exe";
 
    LPCTSTR szExeName = L"notepad.exe";
    DWORD dwProcessId = processNameToId(szExeName);
    if (dwProcessId == 0)
    {
        MessageBox(NULL,
            L"The target process have not been found !",
            L"Notice",
            MB_ICONINFORMATION | MB_OK
        );
        return -1;
    }
    // 根据进程ID得到进程句柄
    HANDLE hTargetProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, dwProcessId);
    if (!hTargetProcess)
    {
        MessageBox(NULL,
            L"Open target process failed !",
            L"Notice",
            MB_ICONINFORMATION | MB_OK
        );
        return 0;
    }
    // 在宿主进程中为线程体开辟一块存储区域
    // 在这里需要注意MEM_COMMIT内存非配类型以及PAGE_EXECUTE_READWRITE内存保护类型
    // 其具体含义请参考MSDN中关于VirtualAllocEx函数的说明。
    void* pRemoteThread = VirtualAllocEx(hTargetProcess, 0, dwThreadSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
    if (!pRemoteThread)
    {
        MessageBox(NULL,
            L"Alloc memory in target process failed !",
            L"notice",
            MB_ICONINFORMATION | MB_OK
        );
        return 0;
    }
    // 设置需要注入的DLL名称
    char szDll[256];
    memset(szDll, 0, 256);
    strcpy_s(szDll, "F:\work\code\C++Pro\x64\Debug\injectionDll.dll");
    // 拷贝注入DLL内容到宿主空间
    if (!WriteProcessMemory(hTargetProcess, pRemoteThread, (LPVOID)szDll, dwThreadSize, 0))
    {
        MessageBox(NULL,
            L"Write data to target process failed !",
            L"Notice",
            MB_ICONINFORMATION | MB_OK
        );
        //::VirtualFreeEx(hTargetProcess, ptszRemoteBuf, dwSize, MEM_DECOMMIT);
        //::CloseHandle(hTargetProcess);
        return 0;
    }
    LPVOID pFunc = LoadLibraryA;
    //在宿主进程中创建线程
    HANDLE hRemoteThread = CreateRemoteThread(hTargetProcess, NULL, 0, (LPTHREAD_START_ROUTINE)pFunc, pRemoteThread, 0, &dwWriteBytes);
    if (!hRemoteThread)
    {
        MessageBox(NULL,
            L"Create remote thread failed !",
            L"Notice",
            MB_ICONINFORMATION | MB_OK
        );
        return 0;
    }
    // 等待LoadLibraryA加载完毕
    WaitForSingleObject(hRemoteThread, INFINITE);
    VirtualFreeEx(hTargetProcess, pRemoteThread, dwThreadSize, MEM_COMMIT);
    CloseHandle(hRemoteThread);
    CloseHandle(hTargetProcess);
    return 0;
}

void CMFC3Dlg::OnBnClickedButton3()
{
    // TODO: 在此添加控件通知处理程序代码
    dll_inject();
}