JetCreateInstanceW

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

INT JetCreateInstanceW(
    JET_INSTANCE* pinstance,
    WORD* szInstanceName   // optional
);

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

' pinstance : JET_INSTANCE* out
' szInstanceName : WORD* optional
Declare PtrSafe Function JetCreateInstanceW Lib "esent" ( _
    ByRef pinstance As LongPtr, _
    ByVal szInstanceName 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

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

require 'fiddle'
require 'fiddle/import'

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

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

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

#uselib "ESENT.dll"
#func global JetCreateInstanceW "JetCreateInstanceW" wptr, wptr
; JetCreateInstanceW pinstance, varptr(szInstanceName)   ; 戻り値は stat
; pinstance : JET_INSTANCE* out -> "wptr"
; szInstanceName : WORD* 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 JetCreateInstanceW "JetCreateInstanceW" int, var
; res = JetCreateInstanceW(pinstance, szInstanceName)
; pinstance : JET_INSTANCE* out -> "int"
; szInstanceName : WORD* optional -> "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。

; INT JetCreateInstanceW(JET_INSTANCE* pinstance, WORD* szInstanceName)
#uselib "ESENT.dll"
#cfunc global JetCreateInstanceW "JetCreateInstanceW" int, var
; res = JetCreateInstanceW(pinstance, szInstanceName)
; pinstance : JET_INSTANCE* out -> "int"
; szInstanceName : WORD* optional -> "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 (
	esent = windows.NewLazySystemDLL("ESENT.dll")
	procJetCreateInstanceW = esent.NewProc("JetCreateInstanceW")
)

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

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

result := DllCall("ESENT\JetCreateInstanceW"
    , "Ptr", pinstance   ; JET_INSTANCE* out
    , "Ptr", szInstanceName   ; WORD* optional
    , "Int")   ; return: INT

●JetCreateInstanceW(pinstance, szInstanceName) = DLL("ESENT.dll", "int JetCreateInstanceW(void*, void*)")
# 呼び出し: JetCreateInstanceW(pinstance, szInstanceName)
# pinstance : JET_INSTANCE* out -> "void*"
# szInstanceName : WORD* 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。