JetBeginSessionW

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

INT JetBeginSessionW(
    JET_INSTANCE instance,
    JET_SESID* psesid,
    WORD* szUserName,   // optional
    WORD* szPassword   // optional
);

<DllImport("ESENT.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function JetBeginSessionW(
    instance As UIntPtr,   ' JET_INSTANCE
    <Out> ByRef psesid As UIntPtr,   ' JET_SESID* out
    szUserName As IntPtr,   ' WORD* optional
    szPassword As IntPtr   ' WORD* optional
) As Integer
End Function

' instance : JET_INSTANCE
' psesid : JET_SESID* out
' szUserName : WORD* optional
' szPassword : WORD* optional
Declare PtrSafe Function JetBeginSessionW Lib "esent" ( _
    ByVal instance As LongPtr, _
    ByRef psesid As LongPtr, _
    ByVal szUserName As LongPtr, _
    ByVal szPassword 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

JetBeginSessionW = ctypes.windll.esent.JetBeginSessionW
JetBeginSessionW.restype = ctypes.c_int
JetBeginSessionW.argtypes = [
    ctypes.c_size_t,  # instance : JET_INSTANCE
    ctypes.c_void_p,  # psesid : JET_SESID* out
    ctypes.POINTER(ctypes.c_ushort),  # szUserName : WORD* optional
    ctypes.POINTER(ctypes.c_ushort),  # szPassword : WORD* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ESENT.dll')
JetBeginSessionW = Fiddle::Function.new(
  lib['JetBeginSessionW'],
  [
    Fiddle::TYPE_UINTPTR_T,  # instance : JET_INSTANCE
    Fiddle::TYPE_VOIDP,  # psesid : JET_SESID* out
    Fiddle::TYPE_VOIDP,  # szUserName : WORD* optional
    Fiddle::TYPE_VOIDP,  # szPassword : WORD* optional
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "esent")]
extern "system" {
    fn JetBeginSessionW(
        instance: usize,  // JET_INSTANCE
        psesid: *mut usize,  // JET_SESID* out
        szUserName: *mut u16,  // WORD* optional
        szPassword: *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 JetBeginSessionW(UIntPtr instance, out UIntPtr psesid, IntPtr szUserName, IntPtr szPassword);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ESENT_JetBeginSessionW' -Namespace Win32 -PassThru
# $api::JetBeginSessionW(instance, psesid, szUserName, szPassword)

#uselib "ESENT.dll"
#func global JetBeginSessionW "JetBeginSessionW" wptr, wptr, wptr, wptr
; JetBeginSessionW instance, psesid, varptr(szUserName), varptr(szPassword)   ; 戻り値は stat
; instance : JET_INSTANCE -> "wptr"
; psesid : JET_SESID* out -> "wptr"
; szUserName : WORD* optional -> "wptr"
; szPassword : 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 JetBeginSessionW "JetBeginSessionW" sptr, int, var, var
; res = JetBeginSessionW(instance, psesid, szUserName, szPassword)
; instance : JET_INSTANCE -> "sptr"
; psesid : JET_SESID* out -> "int"
; szUserName : WORD* optional -> "var"
; szPassword : 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 JetBeginSessionW(JET_INSTANCE instance, JET_SESID* psesid, WORD* szUserName, WORD* szPassword)
#uselib "ESENT.dll"
#cfunc global JetBeginSessionW "JetBeginSessionW" intptr, int, var, var
; res = JetBeginSessionW(instance, psesid, szUserName, szPassword)
; instance : JET_INSTANCE -> "intptr"
; psesid : JET_SESID* out -> "int"
; szUserName : WORD* optional -> "var"
; szPassword : 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")
	procJetBeginSessionW = esent.NewProc("JetBeginSessionW")
)

// instance (JET_INSTANCE), psesid (JET_SESID* out), szUserName (WORD* optional), szPassword (WORD* optional)
r1, _, err := procJetBeginSessionW.Call(
	uintptr(instance),
	uintptr(psesid),
	uintptr(szUserName),
	uintptr(szPassword),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function JetBeginSessionW(
  instance: NativeUInt;   // JET_INSTANCE
  psesid: Pointer;   // JET_SESID* out
  szUserName: Pointer;   // WORD* optional
  szPassword: Pointer   // WORD* optional
): Integer; stdcall;
  external 'ESENT.dll' name 'JetBeginSessionW';

result := DllCall("ESENT\JetBeginSessionW"
    , "UPtr", instance   ; JET_INSTANCE
    , "Ptr", psesid   ; JET_SESID* out
    , "Ptr", szUserName   ; WORD* optional
    , "Ptr", szPassword   ; WORD* optional
    , "Int")   ; return: INT

●JetBeginSessionW(instance, psesid, szUserName, szPassword) = DLL("ESENT.dll", "int JetBeginSessionW(int, void*, void*, void*)")
# 呼び出し: JetBeginSessionW(instance, psesid, szUserName, szPassword)
# instance : JET_INSTANCE -> "int"
# psesid : JET_SESID* out -> "void*"
# szUserName : WORD* optional -> "void*"
# szPassword : 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。