JetGetSystemParameterW

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

INT JetGetSystemParameterW(
    JET_INSTANCE instance,
    JET_SESID sesid,   // optional
    DWORD paramid,
    JET_API_PTR* plParam,   // optional
    WORD* szParam,   // optional
    DWORD cbMax
);

<DllImport("ESENT.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function JetGetSystemParameterW(
    instance As UIntPtr,   ' JET_INSTANCE
    sesid As UIntPtr,   ' JET_SESID optional
    paramid As UInteger,   ' DWORD
    plParam As IntPtr,   ' JET_API_PTR* optional, out
    szParam As IntPtr,   ' WORD* optional, out
    cbMax As UInteger   ' DWORD
) As Integer
End Function

' instance : JET_INSTANCE
' sesid : JET_SESID optional
' paramid : DWORD
' plParam : JET_API_PTR* optional, out
' szParam : WORD* optional, out
' cbMax : DWORD
Declare PtrSafe Function JetGetSystemParameterW Lib "esent" ( _
    ByVal instance As LongPtr, _
    ByVal sesid As LongPtr, _
    ByVal paramid As Long, _
    ByVal plParam As LongPtr, _
    ByVal szParam As LongPtr, _
    ByVal cbMax 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

JetGetSystemParameterW = ctypes.windll.esent.JetGetSystemParameterW
JetGetSystemParameterW.restype = ctypes.c_int
JetGetSystemParameterW.argtypes = [
    ctypes.c_size_t,  # instance : JET_INSTANCE
    ctypes.c_size_t,  # sesid : JET_SESID optional
    wintypes.DWORD,  # paramid : DWORD
    ctypes.c_void_p,  # plParam : JET_API_PTR* optional, out
    ctypes.POINTER(ctypes.c_ushort),  # szParam : WORD* optional, out
    wintypes.DWORD,  # cbMax : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ESENT.dll')
JetGetSystemParameterW = Fiddle::Function.new(
  lib['JetGetSystemParameterW'],
  [
    Fiddle::TYPE_UINTPTR_T,  # instance : JET_INSTANCE
    Fiddle::TYPE_UINTPTR_T,  # sesid : JET_SESID optional
    -Fiddle::TYPE_INT,  # paramid : DWORD
    Fiddle::TYPE_VOIDP,  # plParam : JET_API_PTR* optional, out
    Fiddle::TYPE_VOIDP,  # szParam : WORD* optional, out
    -Fiddle::TYPE_INT,  # cbMax : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "esent")]
extern "system" {
    fn JetGetSystemParameterW(
        instance: usize,  // JET_INSTANCE
        sesid: usize,  // JET_SESID optional
        paramid: u32,  // DWORD
        plParam: *mut usize,  // JET_API_PTR* optional, out
        szParam: *mut u16,  // WORD* optional, out
        cbMax: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ESENT.dll", CharSet = CharSet.Unicode)]
public static extern int JetGetSystemParameterW(UIntPtr instance, UIntPtr sesid, uint paramid, IntPtr plParam, IntPtr szParam, uint cbMax);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ESENT_JetGetSystemParameterW' -Namespace Win32 -PassThru
# $api::JetGetSystemParameterW(instance, sesid, paramid, plParam, szParam, cbMax)

#uselib "ESENT.dll"
#func global JetGetSystemParameterW "JetGetSystemParameterW" wptr, wptr, wptr, wptr, wptr, wptr
; JetGetSystemParameterW instance, sesid, paramid, plParam, varptr(szParam), cbMax   ; 戻り値は stat
; instance : JET_INSTANCE -> "wptr"
; sesid : JET_SESID optional -> "wptr"
; paramid : DWORD -> "wptr"
; plParam : JET_API_PTR* optional, out -> "wptr"
; szParam : WORD* optional, out -> "wptr"
; cbMax : 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 JetGetSystemParameterW "JetGetSystemParameterW" sptr, sptr, int, int, var, int
; res = JetGetSystemParameterW(instance, sesid, paramid, plParam, szParam, cbMax)
; instance : JET_INSTANCE -> "sptr"
; sesid : JET_SESID optional -> "sptr"
; paramid : DWORD -> "int"
; plParam : JET_API_PTR* optional, out -> "int"
; szParam : WORD* optional, out -> "var"
; cbMax : 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 JetGetSystemParameterW(JET_INSTANCE instance, JET_SESID sesid, DWORD paramid, JET_API_PTR* plParam, WORD* szParam, DWORD cbMax)
#uselib "ESENT.dll"
#cfunc global JetGetSystemParameterW "JetGetSystemParameterW" intptr, intptr, int, int, var, int
; res = JetGetSystemParameterW(instance, sesid, paramid, plParam, szParam, cbMax)
; instance : JET_INSTANCE -> "intptr"
; sesid : JET_SESID optional -> "intptr"
; paramid : DWORD -> "int"
; plParam : JET_API_PTR* optional, out -> "int"
; szParam : WORD* optional, out -> "var"
; cbMax : 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")
	procJetGetSystemParameterW = esent.NewProc("JetGetSystemParameterW")
)

// instance (JET_INSTANCE), sesid (JET_SESID optional), paramid (DWORD), plParam (JET_API_PTR* optional, out), szParam (WORD* optional, out), cbMax (DWORD)
r1, _, err := procJetGetSystemParameterW.Call(
	uintptr(instance),
	uintptr(sesid),
	uintptr(paramid),
	uintptr(plParam),
	uintptr(szParam),
	uintptr(cbMax),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function JetGetSystemParameterW(
  instance: NativeUInt;   // JET_INSTANCE
  sesid: NativeUInt;   // JET_SESID optional
  paramid: DWORD;   // DWORD
  plParam: Pointer;   // JET_API_PTR* optional, out
  szParam: Pointer;   // WORD* optional, out
  cbMax: DWORD   // DWORD
): Integer; stdcall;
  external 'ESENT.dll' name 'JetGetSystemParameterW';

result := DllCall("ESENT\JetGetSystemParameterW"
    , "UPtr", instance   ; JET_INSTANCE
    , "UPtr", sesid   ; JET_SESID optional
    , "UInt", paramid   ; DWORD
    , "Ptr", plParam   ; JET_API_PTR* optional, out
    , "Ptr", szParam   ; WORD* optional, out
    , "UInt", cbMax   ; DWORD
    , "Int")   ; return: INT

●JetGetSystemParameterW(instance, sesid, paramid, plParam, szParam, cbMax) = DLL("ESENT.dll", "int JetGetSystemParameterW(int, int, dword, void*, void*, dword)")
# 呼び出し: JetGetSystemParameterW(instance, sesid, paramid, plParam, szParam, cbMax)
# instance : JET_INSTANCE -> "int"
# sesid : JET_SESID optional -> "int"
# paramid : DWORD -> "dword"
# plParam : JET_API_PTR* optional, out -> "void*"
# szParam : WORD* optional, out -> "void*"
# cbMax : 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。