What the DOS?

import ctypes
from ctypes import Structure, windll, byref, POINTER, sizeof
from ctypes.wintypes import DWORD, HANDLE, LPVOID, LPWSTR, ULONG

# --- Structure Definitions ---

class MIB_TCPROW_OWNER_PID(Structure):
    _fields_ = [
        ("dwState", DWORD),
        ("dwLocalAddr", DWORD),
        ("dwLocalPort", DWORD),
        ("dwRemoteAddr", DWORD),
        ("dwRemotePort", DWORD),
        ("dwOwningPid", DWORD),
    ]

class MIB_UDPROW_OWNER_PID(Structure):
    _fields_ = [
        ("dwLocalAddr", DWORD),
        ("dwLocalPort", DWORD),
        ("dwOwningPid", DWORD),
    ]

class IMAGE_DOS_HEADER(Structure):
    _fields_ = [
        ("e_magic", ctypes.c_uint16),
        ("e_cblp", ctypes.c_uint16),
        ("e_cp", ctypes.c_uint16),
        ("e_lfanew", DWORD),
    ]

class IMAGE_DATA_DIRECTORY(Structure):
    _fields_ = [
        ("VirtualAddress", ctypes.c_uint32),
        ("Size", ctypes.c_uint32),
    ]

class IMAGE_OPTIONAL_HEADER(Structure):
    _fields_ = [
        ("Magic", ctypes.c_uint16),
        ("AddressOfEntryPoint", ctypes.c_uint32),
        ("DataDirectory", IMAGE_DATA_DIRECTORY * 16),
    ]

class IMAGE_NT_HEADERS(Structure):
    _fields_ = [
        ("Signature", ctypes.c_uint32),
        ("FileHeader", ctypes.c_uint32),
        ("OptionalHeader", POINTER(IMAGE_OPTIONAL_HEADER)),
    ]

# --- Example: Open a file and read IMAGE_DOS_HEADER ---

def read_dos_header(path):
    with open(path, 'rb') as f:
        dos_header = IMAGE_DOS_HEADER()
        f.readinto(dos_header)
        print(f'DOS Magic: {hex(dos_header.e_magic)}')
        print(f'DOS LFA New: {hex(dos_header.e_lfanew)}')

# --- Example Usage (for a PE file, like notepad.exe) ---
if __name__ == "__main__":
    exe_path = r"C:\Windows\System32\notepad.exe"  # Adjust if needed
    try:
        read_dos_header(exe_path)
    except Exception as e:
        print("Error:", e)