ReadFile

// KERNEL32.dll
#include <windows.h>

BOOL ReadFile(
    HANDLE hFile,
    BYTE* lpBuffer,   // optional
    DWORD nNumberOfBytesToRead,
    DWORD* lpNumberOfBytesRead,   // optional
    OVERLAPPED* lpOverlapped   // optional
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function ReadFile(
    hFile As IntPtr,   ' HANDLE
    lpBuffer As IntPtr,   ' BYTE* optional, out
    nNumberOfBytesToRead As UInteger,   ' DWORD
    lpNumberOfBytesRead As IntPtr,   ' DWORD* optional, out
    lpOverlapped As IntPtr   ' OVERLAPPED* optional, in/out
) As Boolean
End Function

' hFile : HANDLE
' lpBuffer : BYTE* optional, out
' nNumberOfBytesToRead : DWORD
' lpNumberOfBytesRead : DWORD* optional, out
' lpOverlapped : OVERLAPPED* optional, in/out
Declare PtrSafe Function ReadFile Lib "kernel32" ( _
    ByVal hFile As LongPtr, _
    ByVal lpBuffer As LongPtr, _
    ByVal nNumberOfBytesToRead As Long, _
    ByVal lpNumberOfBytesRead As LongPtr, _
    ByVal lpOverlapped As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ReadFile = ctypes.windll.kernel32.ReadFile
ReadFile.restype = wintypes.BOOL
ReadFile.argtypes = [
    wintypes.HANDLE,  # hFile : HANDLE
    ctypes.POINTER(ctypes.c_ubyte),  # lpBuffer : BYTE* optional, out
    wintypes.DWORD,  # nNumberOfBytesToRead : DWORD
    ctypes.POINTER(wintypes.DWORD),  # lpNumberOfBytesRead : DWORD* optional, out
    ctypes.c_void_p,  # lpOverlapped : OVERLAPPED* optional, in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
ReadFile = Fiddle::Function.new(
  lib['ReadFile'],
  [
    Fiddle::TYPE_VOIDP,  # hFile : HANDLE
    Fiddle::TYPE_VOIDP,  # lpBuffer : BYTE* optional, out
    -Fiddle::TYPE_INT,  # nNumberOfBytesToRead : DWORD
    Fiddle::TYPE_VOIDP,  # lpNumberOfBytesRead : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # lpOverlapped : OVERLAPPED* optional, in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn ReadFile(
        hFile: *mut core::ffi::c_void,  // HANDLE
        lpBuffer: *mut u8,  // BYTE* optional, out
        nNumberOfBytesToRead: u32,  // DWORD
        lpNumberOfBytesRead: *mut u32,  // DWORD* optional, out
        lpOverlapped: *mut OVERLAPPED  // OVERLAPPED* optional, in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool ReadFile(IntPtr hFile, IntPtr lpBuffer, uint nNumberOfBytesToRead, IntPtr lpNumberOfBytesRead, IntPtr lpOverlapped);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_ReadFile' -Namespace Win32 -PassThru
# $api::ReadFile(hFile, lpBuffer, nNumberOfBytesToRead, lpNumberOfBytesRead, lpOverlapped)

#uselib "KERNEL32.dll"
#func global ReadFile "ReadFile" sptr, sptr, sptr, sptr, sptr
; ReadFile hFile, varptr(lpBuffer), nNumberOfBytesToRead, varptr(lpNumberOfBytesRead), varptr(lpOverlapped)   ; 戻り値は stat
; hFile : HANDLE -> "sptr"
; lpBuffer : BYTE* optional, out -> "sptr"
; nNumberOfBytesToRead : DWORD -> "sptr"
; lpNumberOfBytesRead : DWORD* optional, out -> "sptr"
; lpOverlapped : OVERLAPPED* optional, in/out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "KERNEL32.dll"
#cfunc global ReadFile "ReadFile" sptr, var, int, var, var
; res = ReadFile(hFile, lpBuffer, nNumberOfBytesToRead, lpNumberOfBytesRead, lpOverlapped)
; hFile : HANDLE -> "sptr"
; lpBuffer : BYTE* optional, out -> "var"
; nNumberOfBytesToRead : DWORD -> "int"
; lpNumberOfBytesRead : DWORD* optional, out -> "var"
; lpOverlapped : OVERLAPPED* optional, in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; BOOL ReadFile(HANDLE hFile, BYTE* lpBuffer, DWORD nNumberOfBytesToRead, DWORD* lpNumberOfBytesRead, OVERLAPPED* lpOverlapped)
#uselib "KERNEL32.dll"
#cfunc global ReadFile "ReadFile" intptr, var, int, var, var
; res = ReadFile(hFile, lpBuffer, nNumberOfBytesToRead, lpNumberOfBytesRead, lpOverlapped)
; hFile : HANDLE -> "intptr"
; lpBuffer : BYTE* optional, out -> "var"
; nNumberOfBytesToRead : DWORD -> "int"
; lpNumberOfBytesRead : DWORD* optional, out -> "var"
; lpOverlapped : OVERLAPPED* optional, in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procReadFile = kernel32.NewProc("ReadFile")
)

// hFile (HANDLE), lpBuffer (BYTE* optional, out), nNumberOfBytesToRead (DWORD), lpNumberOfBytesRead (DWORD* optional, out), lpOverlapped (OVERLAPPED* optional, in/out)
r1, _, err := procReadFile.Call(
	uintptr(hFile),
	uintptr(lpBuffer),
	uintptr(nNumberOfBytesToRead),
	uintptr(lpNumberOfBytesRead),
	uintptr(lpOverlapped),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ReadFile(
  hFile: THandle;   // HANDLE
  lpBuffer: Pointer;   // BYTE* optional, out
  nNumberOfBytesToRead: DWORD;   // DWORD
  lpNumberOfBytesRead: Pointer;   // DWORD* optional, out
  lpOverlapped: Pointer   // OVERLAPPED* optional, in/out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'ReadFile';

result := DllCall("KERNEL32\ReadFile"
    , "Ptr", hFile   ; HANDLE
    , "Ptr", lpBuffer   ; BYTE* optional, out
    , "UInt", nNumberOfBytesToRead   ; DWORD
    , "Ptr", lpNumberOfBytesRead   ; DWORD* optional, out
    , "Ptr", lpOverlapped   ; OVERLAPPED* optional, in/out
    , "Int")   ; return: BOOL

●ReadFile(hFile, lpBuffer, nNumberOfBytesToRead, lpNumberOfBytesRead, lpOverlapped) = DLL("KERNEL32.dll", "bool ReadFile(void*, void*, dword, void*, void*)")
# 呼び出し: ReadFile(hFile, lpBuffer, nNumberOfBytesToRead, lpNumberOfBytesRead, lpOverlapped)
# hFile : HANDLE -> "void*"
# lpBuffer : BYTE* optional, out -> "void*"
# nNumberOfBytesToRead : DWORD -> "dword"
# lpNumberOfBytesRead : DWORD* optional, out -> "void*"
# lpOverlapped : OVERLAPPED* optional, in/out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。