JetBackupInstanceW

// ESENT.dll  (Unicode / -W)
#include <windows.h>

INT JetBackupInstanceW(
    JET_INSTANCE instance,
    WORD* szBackupPath,
    DWORD grbit,
    JET_PFNSTATUS pfnStatus   // optional
);

<DllImport("ESENT.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function JetBackupInstanceW(
    instance As UIntPtr,   ' JET_INSTANCE
    ByRef szBackupPath As UShort,   ' WORD*
    grbit As UInteger,   ' DWORD
    pfnStatus As IntPtr   ' JET_PFNSTATUS optional
) As Integer
End Function

' instance : JET_INSTANCE
' szBackupPath : WORD*
' grbit : DWORD
' pfnStatus : JET_PFNSTATUS optional
Declare PtrSafe Function JetBackupInstanceW Lib "esent" ( _
    ByVal instance As LongPtr, _
    ByRef szBackupPath As Integer, _
    ByVal grbit As Long, _
    ByVal pfnStatus As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

JetBackupInstanceW = ctypes.windll.esent.JetBackupInstanceW
JetBackupInstanceW.restype = ctypes.c_int
JetBackupInstanceW.argtypes = [
    ctypes.c_size_t,  # instance : JET_INSTANCE
    ctypes.POINTER(ctypes.c_ushort),  # szBackupPath : WORD*
    wintypes.DWORD,  # grbit : DWORD
    ctypes.c_void_p,  # pfnStatus : JET_PFNSTATUS optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ESENT.dll')
JetBackupInstanceW = Fiddle::Function.new(
  lib['JetBackupInstanceW'],
  [
    Fiddle::TYPE_UINTPTR_T,  # instance : JET_INSTANCE
    Fiddle::TYPE_VOIDP,  # szBackupPath : WORD*
    -Fiddle::TYPE_INT,  # grbit : DWORD
    Fiddle::TYPE_VOIDP,  # pfnStatus : JET_PFNSTATUS optional
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "esent")]
extern "system" {
    fn JetBackupInstanceW(
        instance: usize,  // JET_INSTANCE
        szBackupPath: *mut u16,  // WORD*
        grbit: u32,  // DWORD
        pfnStatus: *const core::ffi::c_void  // JET_PFNSTATUS optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ESENT.dll", CharSet = CharSet.Unicode)]
public static extern int JetBackupInstanceW(UIntPtr instance, ref ushort szBackupPath, uint grbit, IntPtr pfnStatus);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ESENT_JetBackupInstanceW' -Namespace Win32 -PassThru
# $api::JetBackupInstanceW(instance, szBackupPath, grbit, pfnStatus)

#uselib "ESENT.dll"
#func global JetBackupInstanceW "JetBackupInstanceW" wptr, wptr, wptr, wptr
; JetBackupInstanceW instance, varptr(szBackupPath), grbit, pfnStatus   ; 戻り値は stat
; instance : JET_INSTANCE -> "wptr"
; szBackupPath : WORD* -> "wptr"
; grbit : DWORD -> "wptr"
; pfnStatus : JET_PFNSTATUS optional -> "wptr"
; ※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 "ESENT.dll"
#cfunc global JetBackupInstanceW "JetBackupInstanceW" sptr, var, int, sptr
; res = JetBackupInstanceW(instance, szBackupPath, grbit, pfnStatus)
; instance : JET_INSTANCE -> "sptr"
; szBackupPath : WORD* -> "var"
; grbit : DWORD -> "int"
; pfnStatus : JET_PFNSTATUS optional -> "sptr"
; ※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。

; INT JetBackupInstanceW(JET_INSTANCE instance, WORD* szBackupPath, DWORD grbit, JET_PFNSTATUS pfnStatus)
#uselib "ESENT.dll"
#cfunc global JetBackupInstanceW "JetBackupInstanceW" intptr, var, int, intptr
; res = JetBackupInstanceW(instance, szBackupPath, grbit, pfnStatus)
; instance : JET_INSTANCE -> "intptr"
; szBackupPath : WORD* -> "var"
; grbit : DWORD -> "int"
; pfnStatus : JET_PFNSTATUS optional -> "intptr"
; ※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 (
	esent = windows.NewLazySystemDLL("ESENT.dll")
	procJetBackupInstanceW = esent.NewProc("JetBackupInstanceW")
)

// instance (JET_INSTANCE), szBackupPath (WORD*), grbit (DWORD), pfnStatus (JET_PFNSTATUS optional)
r1, _, err := procJetBackupInstanceW.Call(
	uintptr(instance),
	uintptr(szBackupPath),
	uintptr(grbit),
	uintptr(pfnStatus),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function JetBackupInstanceW(
  instance: NativeUInt;   // JET_INSTANCE
  szBackupPath: Pointer;   // WORD*
  grbit: DWORD;   // DWORD
  pfnStatus: Pointer   // JET_PFNSTATUS optional
): Integer; stdcall;
  external 'ESENT.dll' name 'JetBackupInstanceW';

result := DllCall("ESENT\JetBackupInstanceW"
    , "UPtr", instance   ; JET_INSTANCE
    , "Ptr", szBackupPath   ; WORD*
    , "UInt", grbit   ; DWORD
    , "Ptr", pfnStatus   ; JET_PFNSTATUS optional
    , "Int")   ; return: INT

●JetBackupInstanceW(instance, szBackupPath, grbit, pfnStatus) = DLL("ESENT.dll", "int JetBackupInstanceW(int, void*, dword, void*)")
# 呼び出し: JetBackupInstanceW(instance, szBackupPath, grbit, pfnStatus)
# instance : JET_INSTANCE -> "int"
# szBackupPath : WORD* -> "void*"
# grbit : DWORD -> "dword"
# pfnStatus : JET_PFNSTATUS optional -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。