JetCreateInstance2W

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

INT JetCreateInstance2W(
    JET_INSTANCE* pinstance,
    WORD* szInstanceName,   // optional
    WORD* szDisplayName,   // optional
    DWORD grbit
);

<DllImport("ESENT.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function JetCreateInstance2W(
    <Out> ByRef pinstance As UIntPtr,   ' JET_INSTANCE* out
    szInstanceName As IntPtr,   ' WORD* optional
    szDisplayName As IntPtr,   ' WORD* optional
    grbit As UInteger   ' DWORD
) As Integer
End Function

' pinstance : JET_INSTANCE* out
' szInstanceName : WORD* optional
' szDisplayName : WORD* optional
' grbit : DWORD
Declare PtrSafe Function JetCreateInstance2W Lib "esent" ( _
    ByRef pinstance As LongPtr, _
    ByVal szInstanceName As LongPtr, _
    ByVal szDisplayName As LongPtr, _
    ByVal grbit As Long) 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

JetCreateInstance2W = ctypes.windll.esent.JetCreateInstance2W
JetCreateInstance2W.restype = ctypes.c_int
JetCreateInstance2W.argtypes = [
    ctypes.c_void_p,  # pinstance : JET_INSTANCE* out
    ctypes.POINTER(ctypes.c_ushort),  # szInstanceName : WORD* optional
    ctypes.POINTER(ctypes.c_ushort),  # szDisplayName : WORD* optional
    wintypes.DWORD,  # grbit : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ESENT.dll')
JetCreateInstance2W = Fiddle::Function.new(
  lib['JetCreateInstance2W'],
  [
    Fiddle::TYPE_VOIDP,  # pinstance : JET_INSTANCE* out
    Fiddle::TYPE_VOIDP,  # szInstanceName : WORD* optional
    Fiddle::TYPE_VOIDP,  # szDisplayName : WORD* optional
    -Fiddle::TYPE_INT,  # grbit : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "esent")]
extern "system" {
    fn JetCreateInstance2W(
        pinstance: *mut usize,  // JET_INSTANCE* out
        szInstanceName: *mut u16,  // WORD* optional
        szDisplayName: *mut u16,  // WORD* optional
        grbit: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ESENT.dll", CharSet = CharSet.Unicode)]
public static extern int JetCreateInstance2W(out UIntPtr pinstance, IntPtr szInstanceName, IntPtr szDisplayName, uint grbit);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ESENT_JetCreateInstance2W' -Namespace Win32 -PassThru
# $api::JetCreateInstance2W(pinstance, szInstanceName, szDisplayName, grbit)

#uselib "ESENT.dll"
#func global JetCreateInstance2W "JetCreateInstance2W" wptr, wptr, wptr, wptr
; JetCreateInstance2W pinstance, varptr(szInstanceName), varptr(szDisplayName), grbit   ; 戻り値は stat
; pinstance : JET_INSTANCE* out -> "wptr"
; szInstanceName : WORD* optional -> "wptr"
; szDisplayName : WORD* optional -> "wptr"
; grbit : DWORD -> "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 JetCreateInstance2W "JetCreateInstance2W" int, var, var, int
; res = JetCreateInstance2W(pinstance, szInstanceName, szDisplayName, grbit)
; pinstance : JET_INSTANCE* out -> "int"
; szInstanceName : WORD* optional -> "var"
; szDisplayName : WORD* optional -> "var"
; grbit : DWORD -> "int"
; ※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 JetCreateInstance2W(JET_INSTANCE* pinstance, WORD* szInstanceName, WORD* szDisplayName, DWORD grbit)
#uselib "ESENT.dll"
#cfunc global JetCreateInstance2W "JetCreateInstance2W" int, var, var, int
; res = JetCreateInstance2W(pinstance, szInstanceName, szDisplayName, grbit)
; pinstance : JET_INSTANCE* out -> "int"
; szInstanceName : WORD* optional -> "var"
; szDisplayName : WORD* optional -> "var"
; grbit : DWORD -> "int"
; ※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")
	procJetCreateInstance2W = esent.NewProc("JetCreateInstance2W")
)

// pinstance (JET_INSTANCE* out), szInstanceName (WORD* optional), szDisplayName (WORD* optional), grbit (DWORD)
r1, _, err := procJetCreateInstance2W.Call(
	uintptr(pinstance),
	uintptr(szInstanceName),
	uintptr(szDisplayName),
	uintptr(grbit),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function JetCreateInstance2W(
  pinstance: Pointer;   // JET_INSTANCE* out
  szInstanceName: Pointer;   // WORD* optional
  szDisplayName: Pointer;   // WORD* optional
  grbit: DWORD   // DWORD
): Integer; stdcall;
  external 'ESENT.dll' name 'JetCreateInstance2W';

result := DllCall("ESENT\JetCreateInstance2W"
    , "Ptr", pinstance   ; JET_INSTANCE* out
    , "Ptr", szInstanceName   ; WORD* optional
    , "Ptr", szDisplayName   ; WORD* optional
    , "UInt", grbit   ; DWORD
    , "Int")   ; return: INT

●JetCreateInstance2W(pinstance, szInstanceName, szDisplayName, grbit) = DLL("ESENT.dll", "int JetCreateInstance2W(void*, void*, void*, dword)")
# 呼び出し: JetCreateInstance2W(pinstance, szInstanceName, szDisplayName, grbit)
# pinstance : JET_INSTANCE* out -> "void*"
# szInstanceName : WORD* optional -> "void*"
# szDisplayName : WORD* optional -> "void*"
# grbit : 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。