InternetSetFilePointer

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

DWORD InternetSetFilePointer(
    void* hFile,
    INT lDistanceToMove,
    INT* lpDistanceToMoveHigh,   // optional
    DWORD dwMoveMethod,
    UINT_PTR dwContext   // optional
);

<DllImport("WININET.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function InternetSetFilePointer(
    hFile As IntPtr,   ' void*
    lDistanceToMove As Integer,   ' INT
    lpDistanceToMoveHigh As IntPtr,   ' INT* optional, in/out
    dwMoveMethod As UInteger,   ' DWORD
    dwContext As UIntPtr   ' UINT_PTR optional
) As UInteger
End Function

' hFile : void*
' lDistanceToMove : INT
' lpDistanceToMoveHigh : INT* optional, in/out
' dwMoveMethod : DWORD
' dwContext : UINT_PTR optional
Declare PtrSafe Function InternetSetFilePointer Lib "wininet" ( _
    ByVal hFile As LongPtr, _
    ByVal lDistanceToMove As Long, _
    ByVal lpDistanceToMoveHigh As LongPtr, _
    ByVal dwMoveMethod As Long, _
    ByVal dwContext 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

InternetSetFilePointer = ctypes.windll.wininet.InternetSetFilePointer
InternetSetFilePointer.restype = wintypes.DWORD
InternetSetFilePointer.argtypes = [
    ctypes.POINTER(None),  # hFile : void*
    ctypes.c_int,  # lDistanceToMove : INT
    ctypes.POINTER(ctypes.c_int),  # lpDistanceToMoveHigh : INT* optional, in/out
    wintypes.DWORD,  # dwMoveMethod : DWORD
    ctypes.c_size_t,  # dwContext : UINT_PTR optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
InternetSetFilePointer = Fiddle::Function.new(
  lib['InternetSetFilePointer'],
  [
    Fiddle::TYPE_VOIDP,  # hFile : void*
    Fiddle::TYPE_INT,  # lDistanceToMove : INT
    Fiddle::TYPE_VOIDP,  # lpDistanceToMoveHigh : INT* optional, in/out
    -Fiddle::TYPE_INT,  # dwMoveMethod : DWORD
    Fiddle::TYPE_UINTPTR_T,  # dwContext : UINT_PTR optional
  ],
  -Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn InternetSetFilePointer(
        hFile: *mut (),  // void*
        lDistanceToMove: i32,  // INT
        lpDistanceToMoveHigh: *mut i32,  // INT* optional, in/out
        dwMoveMethod: u32,  // DWORD
        dwContext: usize  // UINT_PTR optional
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WININET.dll", SetLastError = true)]
public static extern uint InternetSetFilePointer(IntPtr hFile, int lDistanceToMove, IntPtr lpDistanceToMoveHigh, uint dwMoveMethod, UIntPtr dwContext);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_InternetSetFilePointer' -Namespace Win32 -PassThru
# $api::InternetSetFilePointer(hFile, lDistanceToMove, lpDistanceToMoveHigh, dwMoveMethod, dwContext)

#uselib "WININET.dll"
#func global InternetSetFilePointer "InternetSetFilePointer" sptr, sptr, sptr, sptr, sptr
; InternetSetFilePointer hFile, lDistanceToMove, varptr(lpDistanceToMoveHigh), dwMoveMethod, dwContext   ; 戻り値は stat
; hFile : void* -> "sptr"
; lDistanceToMove : INT -> "sptr"
; lpDistanceToMoveHigh : INT* optional, in/out -> "sptr"
; dwMoveMethod : DWORD -> "sptr"
; dwContext : UINT_PTR optional -> "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。

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

var (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procInternetSetFilePointer = wininet.NewProc("InternetSetFilePointer")
)

// hFile (void*), lDistanceToMove (INT), lpDistanceToMoveHigh (INT* optional, in/out), dwMoveMethod (DWORD), dwContext (UINT_PTR optional)
r1, _, err := procInternetSetFilePointer.Call(
	uintptr(hFile),
	uintptr(lDistanceToMove),
	uintptr(lpDistanceToMoveHigh),
	uintptr(dwMoveMethod),
	uintptr(dwContext),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function InternetSetFilePointer(
  hFile: Pointer;   // void*
  lDistanceToMove: Integer;   // INT
  lpDistanceToMoveHigh: Pointer;   // INT* optional, in/out
  dwMoveMethod: DWORD;   // DWORD
  dwContext: NativeUInt   // UINT_PTR optional
): DWORD; stdcall;
  external 'WININET.dll' name 'InternetSetFilePointer';

result := DllCall("WININET\InternetSetFilePointer"
    , "Ptr", hFile   ; void*
    , "Int", lDistanceToMove   ; INT
    , "Ptr", lpDistanceToMoveHigh   ; INT* optional, in/out
    , "UInt", dwMoveMethod   ; DWORD
    , "UPtr", dwContext   ; UINT_PTR optional
    , "UInt")   ; return: DWORD

●InternetSetFilePointer(hFile, lDistanceToMove, lpDistanceToMoveHigh, dwMoveMethod, dwContext) = DLL("WININET.dll", "dword InternetSetFilePointer(void*, int, void*, dword, int)")
# 呼び出し: InternetSetFilePointer(hFile, lDistanceToMove, lpDistanceToMoveHigh, dwMoveMethod, dwContext)
# hFile : void* -> "void*"
# lDistanceToMove : INT -> "int"
# lpDistanceToMoveHigh : INT* optional, in/out -> "void*"
# dwMoveMethod : DWORD -> "dword"
# dwContext : UINT_PTR optional -> "int"
# 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)。

const std = @import("std");

extern "wininet" fn InternetSetFilePointer(
    hFile: ?*anyopaque, // void*
    lDistanceToMove: i32, // INT
    lpDistanceToMoveHigh: [*c]i32, // INT* optional, in/out
    dwMoveMethod: u32, // DWORD
    dwContext: usize // UINT_PTR optional
) callconv(std.os.windows.WINAPI) u32;

proc InternetSetFilePointer(
    hFile: pointer,  # void*
    lDistanceToMove: int32,  # INT
    lpDistanceToMoveHigh: ptr int32,  # INT* optional, in/out
    dwMoveMethod: uint32,  # DWORD
    dwContext: uint  # UINT_PTR optional
): uint32 {.importc: "InternetSetFilePointer", stdcall, dynlib: "WININET.dll".}

pragma(lib, "wininet");
extern(Windows)
uint InternetSetFilePointer(
    void* hFile,   // void*
    int lDistanceToMove,   // INT
    int* lpDistanceToMoveHigh,   // INT* optional, in/out
    uint dwMoveMethod,   // DWORD
    size_t dwContext   // UINT_PTR optional
);

ccall((:InternetSetFilePointer, "WININET.dll"), stdcall, UInt32,
      (Ptr{Cvoid}, Int32, Ptr{Int32}, UInt32, Csize_t),
      hFile, lDistanceToMove, lpDistanceToMoveHigh, dwMoveMethod, dwContext)
# hFile : void* -> Ptr{Cvoid}
# lDistanceToMove : INT -> Int32
# lpDistanceToMoveHigh : INT* optional, in/out -> Ptr{Int32}
# dwMoveMethod : DWORD -> UInt32
# dwContext : UINT_PTR optional -> Csize_t
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t InternetSetFilePointer(
    void* hFile,
    int32_t lDistanceToMove,
    int32_t* lpDistanceToMoveHigh,
    uint32_t dwMoveMethod,
    uintptr_t dwContext);
]]
local wininet = ffi.load("wininet")
-- wininet.InternetSetFilePointer(hFile, lDistanceToMove, lpDistanceToMoveHigh, dwMoveMethod, dwContext)
-- hFile : void*
-- lDistanceToMove : INT
-- lpDistanceToMoveHigh : INT* optional, in/out
-- dwMoveMethod : DWORD
-- dwContext : UINT_PTR optional
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('WININET.dll');
const InternetSetFilePointer = lib.func('__stdcall', 'InternetSetFilePointer', 'uint32_t', ['void *', 'int32_t', 'int32_t *', 'uint32_t', 'uintptr_t']);
// InternetSetFilePointer(hFile, lDistanceToMove, lpDistanceToMoveHigh, dwMoveMethod, dwContext)
// hFile : void* -> 'void *'
// lDistanceToMove : INT -> 'int32_t'
// lpDistanceToMoveHigh : INT* optional, in/out -> 'int32_t *'
// dwMoveMethod : DWORD -> 'uint32_t'
// dwContext : UINT_PTR optional -> 'uintptr_t'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("WININET.dll", {
  InternetSetFilePointer: { parameters: ["pointer", "i32", "pointer", "u32", "usize"], result: "u32" },
});
// lib.symbols.InternetSetFilePointer(hFile, lDistanceToMove, lpDistanceToMoveHigh, dwMoveMethod, dwContext)
// hFile : void* -> "pointer"
// lDistanceToMove : INT -> "i32"
// lpDistanceToMoveHigh : INT* optional, in/out -> "pointer"
// dwMoveMethod : DWORD -> "u32"
// dwContext : UINT_PTR optional -> "usize"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t InternetSetFilePointer(
    void* hFile,
    int32_t lDistanceToMove,
    int32_t* lpDistanceToMoveHigh,
    uint32_t dwMoveMethod,
    size_t dwContext);
C, "WININET.dll");
// $ffi->InternetSetFilePointer(hFile, lDistanceToMove, lpDistanceToMoveHigh, dwMoveMethod, dwContext);
// hFile : void*
// lDistanceToMove : INT
// lpDistanceToMoveHigh : INT* optional, in/out
// dwMoveMethod : DWORD
// dwContext : UINT_PTR optional
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Wininet extends StdCallLibrary {
    Wininet INSTANCE = Native.load("wininet", Wininet.class);
    int InternetSetFilePointer(
        Pointer hFile,   // void*
        int lDistanceToMove,   // INT
        IntByReference lpDistanceToMoveHigh,   // INT* optional, in/out
        int dwMoveMethod,   // DWORD
        long dwContext   // UINT_PTR optional
    );
}

@[Link("wininet")]
lib LibWININET
  fun InternetSetFilePointer = InternetSetFilePointer(
    hFile : Void*,   # void*
    lDistanceToMove : Int32,   # INT
    lpDistanceToMoveHigh : Int32*,   # INT* optional, in/out
    dwMoveMethod : UInt32,   # DWORD
    dwContext : LibC::SizeT   # UINT_PTR optional
  ) : UInt32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef InternetSetFilePointerNative = Uint32 Function(Pointer<Void>, Int32, Pointer<Int32>, Uint32, UintPtr);
typedef InternetSetFilePointerDart = int Function(Pointer<Void>, int, Pointer<Int32>, int, int);
final InternetSetFilePointer = DynamicLibrary.open('WININET.dll')
    .lookupFunction<InternetSetFilePointerNative, InternetSetFilePointerDart>('InternetSetFilePointer');
// hFile : void* -> Pointer<Void>
// lDistanceToMove : INT -> Int32
// lpDistanceToMoveHigh : INT* optional, in/out -> Pointer<Int32>
// dwMoveMethod : DWORD -> Uint32
// dwContext : UINT_PTR optional -> UintPtr
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function InternetSetFilePointer(
  hFile: Pointer;   // void*
  lDistanceToMove: Integer;   // INT
  lpDistanceToMoveHigh: Pointer;   // INT* optional, in/out
  dwMoveMethod: DWORD;   // DWORD
  dwContext: NativeUInt   // UINT_PTR optional
): DWORD; stdcall;
  external 'WININET.dll' name 'InternetSetFilePointer';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "InternetSetFilePointer"
  c_InternetSetFilePointer :: Ptr () -> Int32 -> Ptr Int32 -> Word32 -> CUIntPtr -> IO Word32
-- hFile : void* -> Ptr ()
-- lDistanceToMove : INT -> Int32
-- lpDistanceToMoveHigh : INT* optional, in/out -> Ptr Int32
-- dwMoveMethod : DWORD -> Word32
-- dwContext : UINT_PTR optional -> CUIntPtr
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let internetsetfilepointer =
  foreign "InternetSetFilePointer"
    ((ptr void) @-> int32_t @-> (ptr int32_t) @-> uint32_t @-> size_t @-> returning uint32_t)
(* hFile : void* -> (ptr void) *)
(* lDistanceToMove : INT -> int32_t *)
(* lpDistanceToMoveHigh : INT* optional, in/out -> (ptr int32_t) *)
(* dwMoveMethod : DWORD -> uint32_t *)
(* dwContext : UINT_PTR optional -> size_t *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library wininet (t "WININET.dll"))
(cffi:use-foreign-library wininet)

(cffi:defcfun ("InternetSetFilePointer" internet-set-file-pointer :convention :stdcall) :uint32
  (h-file :pointer)   ; void*
  (l-distance-to-move :int32)   ; INT
  (lp-distance-to-move-high :pointer)   ; INT* optional, in/out
  (dw-move-method :uint32)   ; DWORD
  (dw-context :uint64))   ; UINT_PTR optional
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $InternetSetFilePointer = Win32::API::More->new('WININET',
    'DWORD InternetSetFilePointer(LPVOID hFile, int lDistanceToMove, LPVOID lpDistanceToMoveHigh, DWORD dwMoveMethod, WPARAM dwContext)');
# my $ret = $InternetSetFilePointer->Call($hFile, $lDistanceToMove, $lpDistanceToMoveHigh, $dwMoveMethod, $dwContext);
# hFile : void* -> LPVOID
# lDistanceToMove : INT -> int
# lpDistanceToMoveHigh : INT* optional, in/out -> LPVOID
# dwMoveMethod : DWORD -> DWORD
# dwContext : UINT_PTR optional -> WPARAM
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。