UnlockFile

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

BOOL UnlockFile(
    HANDLE hFile,
    DWORD dwFileOffsetLow,
    DWORD dwFileOffsetHigh,
    DWORD nNumberOfBytesToUnlockLow,
    DWORD nNumberOfBytesToUnlockHigh
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function UnlockFile(
    hFile As IntPtr,   ' HANDLE
    dwFileOffsetLow As UInteger,   ' DWORD
    dwFileOffsetHigh As UInteger,   ' DWORD
    nNumberOfBytesToUnlockLow As UInteger,   ' DWORD
    nNumberOfBytesToUnlockHigh As UInteger   ' DWORD
) As Boolean
End Function

' hFile : HANDLE
' dwFileOffsetLow : DWORD
' dwFileOffsetHigh : DWORD
' nNumberOfBytesToUnlockLow : DWORD
' nNumberOfBytesToUnlockHigh : DWORD
Declare PtrSafe Function UnlockFile Lib "kernel32" ( _
    ByVal hFile As LongPtr, _
    ByVal dwFileOffsetLow As Long, _
    ByVal dwFileOffsetHigh As Long, _
    ByVal nNumberOfBytesToUnlockLow As Long, _
    ByVal nNumberOfBytesToUnlockHigh As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

UnlockFile = ctypes.windll.kernel32.UnlockFile
UnlockFile.restype = wintypes.BOOL
UnlockFile.argtypes = [
    wintypes.HANDLE,  # hFile : HANDLE
    wintypes.DWORD,  # dwFileOffsetLow : DWORD
    wintypes.DWORD,  # dwFileOffsetHigh : DWORD
    wintypes.DWORD,  # nNumberOfBytesToUnlockLow : DWORD
    wintypes.DWORD,  # nNumberOfBytesToUnlockHigh : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
UnlockFile = Fiddle::Function.new(
  lib['UnlockFile'],
  [
    Fiddle::TYPE_VOIDP,  # hFile : HANDLE
    -Fiddle::TYPE_INT,  # dwFileOffsetLow : DWORD
    -Fiddle::TYPE_INT,  # dwFileOffsetHigh : DWORD
    -Fiddle::TYPE_INT,  # nNumberOfBytesToUnlockLow : DWORD
    -Fiddle::TYPE_INT,  # nNumberOfBytesToUnlockHigh : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn UnlockFile(
        hFile: *mut core::ffi::c_void,  // HANDLE
        dwFileOffsetLow: u32,  // DWORD
        dwFileOffsetHigh: u32,  // DWORD
        nNumberOfBytesToUnlockLow: u32,  // DWORD
        nNumberOfBytesToUnlockHigh: u32  // DWORD
    ) -> 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 UnlockFile(IntPtr hFile, uint dwFileOffsetLow, uint dwFileOffsetHigh, uint nNumberOfBytesToUnlockLow, uint nNumberOfBytesToUnlockHigh);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_UnlockFile' -Namespace Win32 -PassThru
# $api::UnlockFile(hFile, dwFileOffsetLow, dwFileOffsetHigh, nNumberOfBytesToUnlockLow, nNumberOfBytesToUnlockHigh)

#uselib "KERNEL32.dll"
#func global UnlockFile "UnlockFile" sptr, sptr, sptr, sptr, sptr
; UnlockFile hFile, dwFileOffsetLow, dwFileOffsetHigh, nNumberOfBytesToUnlockLow, nNumberOfBytesToUnlockHigh   ; 戻り値は stat
; hFile : HANDLE -> "sptr"
; dwFileOffsetLow : DWORD -> "sptr"
; dwFileOffsetHigh : DWORD -> "sptr"
; nNumberOfBytesToUnlockLow : DWORD -> "sptr"
; nNumberOfBytesToUnlockHigh : DWORD -> "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 UnlockFile "UnlockFile" sptr, int, int, int, int
; res = UnlockFile(hFile, dwFileOffsetLow, dwFileOffsetHigh, nNumberOfBytesToUnlockLow, nNumberOfBytesToUnlockHigh)
; hFile : HANDLE -> "sptr"
; dwFileOffsetLow : DWORD -> "int"
; dwFileOffsetHigh : DWORD -> "int"
; nNumberOfBytesToUnlockLow : DWORD -> "int"
; nNumberOfBytesToUnlockHigh : DWORD -> "int"

; BOOL UnlockFile(HANDLE hFile, DWORD dwFileOffsetLow, DWORD dwFileOffsetHigh, DWORD nNumberOfBytesToUnlockLow, DWORD nNumberOfBytesToUnlockHigh)
#uselib "KERNEL32.dll"
#cfunc global UnlockFile "UnlockFile" intptr, int, int, int, int
; res = UnlockFile(hFile, dwFileOffsetLow, dwFileOffsetHigh, nNumberOfBytesToUnlockLow, nNumberOfBytesToUnlockHigh)
; hFile : HANDLE -> "intptr"
; dwFileOffsetLow : DWORD -> "int"
; dwFileOffsetHigh : DWORD -> "int"
; nNumberOfBytesToUnlockLow : DWORD -> "int"
; nNumberOfBytesToUnlockHigh : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procUnlockFile = kernel32.NewProc("UnlockFile")
)

// hFile (HANDLE), dwFileOffsetLow (DWORD), dwFileOffsetHigh (DWORD), nNumberOfBytesToUnlockLow (DWORD), nNumberOfBytesToUnlockHigh (DWORD)
r1, _, err := procUnlockFile.Call(
	uintptr(hFile),
	uintptr(dwFileOffsetLow),
	uintptr(dwFileOffsetHigh),
	uintptr(nNumberOfBytesToUnlockLow),
	uintptr(nNumberOfBytesToUnlockHigh),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function UnlockFile(
  hFile: THandle;   // HANDLE
  dwFileOffsetLow: DWORD;   // DWORD
  dwFileOffsetHigh: DWORD;   // DWORD
  nNumberOfBytesToUnlockLow: DWORD;   // DWORD
  nNumberOfBytesToUnlockHigh: DWORD   // DWORD
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'UnlockFile';

result := DllCall("KERNEL32\UnlockFile"
    , "Ptr", hFile   ; HANDLE
    , "UInt", dwFileOffsetLow   ; DWORD
    , "UInt", dwFileOffsetHigh   ; DWORD
    , "UInt", nNumberOfBytesToUnlockLow   ; DWORD
    , "UInt", nNumberOfBytesToUnlockHigh   ; DWORD
    , "Int")   ; return: BOOL

●UnlockFile(hFile, dwFileOffsetLow, dwFileOffsetHigh, nNumberOfBytesToUnlockLow, nNumberOfBytesToUnlockHigh) = DLL("KERNEL32.dll", "bool UnlockFile(void*, dword, dword, dword, dword)")
# 呼び出し: UnlockFile(hFile, dwFileOffsetLow, dwFileOffsetHigh, nNumberOfBytesToUnlockLow, nNumberOfBytesToUnlockHigh)
# hFile : HANDLE -> "void*"
# dwFileOffsetLow : DWORD -> "dword"
# dwFileOffsetHigh : DWORD -> "dword"
# nNumberOfBytesToUnlockLow : DWORD -> "dword"
# nNumberOfBytesToUnlockHigh : DWORD -> "dword"
# 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)。