JetGetLogInfoInstanceA

// ESENT.dll  (ANSI / -A)
#include <windows.h>

INT JetGetLogInfoInstanceA(
    JET_INSTANCE instance,
    CHAR* szzLogs,   // optional
    DWORD cbMax,
    DWORD* pcbActual   // optional
);

<DllImport("ESENT.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function JetGetLogInfoInstanceA(
    instance As UIntPtr,   ' JET_INSTANCE
    szzLogs As IntPtr,   ' CHAR* optional, out
    cbMax As UInteger,   ' DWORD
    pcbActual As IntPtr   ' DWORD* optional, out
) As Integer
End Function

' instance : JET_INSTANCE
' szzLogs : CHAR* optional, out
' cbMax : DWORD
' pcbActual : DWORD* optional, out
Declare PtrSafe Function JetGetLogInfoInstanceA Lib "esent" ( _
    ByVal instance As LongPtr, _
    ByVal szzLogs As LongPtr, _
    ByVal cbMax As Long, _
    ByVal pcbActual As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

JetGetLogInfoInstanceA = ctypes.windll.esent.JetGetLogInfoInstanceA
JetGetLogInfoInstanceA.restype = ctypes.c_int
JetGetLogInfoInstanceA.argtypes = [
    ctypes.c_size_t,  # instance : JET_INSTANCE
    ctypes.POINTER(ctypes.c_byte),  # szzLogs : CHAR* optional, out
    wintypes.DWORD,  # cbMax : DWORD
    ctypes.POINTER(wintypes.DWORD),  # pcbActual : DWORD* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ESENT.dll')
JetGetLogInfoInstanceA = Fiddle::Function.new(
  lib['JetGetLogInfoInstanceA'],
  [
    Fiddle::TYPE_UINTPTR_T,  # instance : JET_INSTANCE
    Fiddle::TYPE_VOIDP,  # szzLogs : CHAR* optional, out
    -Fiddle::TYPE_INT,  # cbMax : DWORD
    Fiddle::TYPE_VOIDP,  # pcbActual : DWORD* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "esent")]
extern "system" {
    fn JetGetLogInfoInstanceA(
        instance: usize,  // JET_INSTANCE
        szzLogs: *mut i8,  // CHAR* optional, out
        cbMax: u32,  // DWORD
        pcbActual: *mut u32  // DWORD* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ESENT.dll", CharSet = CharSet.Ansi)]
public static extern int JetGetLogInfoInstanceA(UIntPtr instance, IntPtr szzLogs, uint cbMax, IntPtr pcbActual);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ESENT_JetGetLogInfoInstanceA' -Namespace Win32 -PassThru
# $api::JetGetLogInfoInstanceA(instance, szzLogs, cbMax, pcbActual)

#uselib "ESENT.dll"
#func global JetGetLogInfoInstanceA "JetGetLogInfoInstanceA" sptr, sptr, sptr, sptr
; JetGetLogInfoInstanceA instance, varptr(szzLogs), cbMax, varptr(pcbActual)   ; 戻り値は stat
; instance : JET_INSTANCE -> "sptr"
; szzLogs : CHAR* optional, out -> "sptr"
; cbMax : DWORD -> "sptr"
; pcbActual : DWORD* optional, out -> "sptr"
; ※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 JetGetLogInfoInstanceA "JetGetLogInfoInstanceA" sptr, var, int, var
; res = JetGetLogInfoInstanceA(instance, szzLogs, cbMax, pcbActual)
; instance : JET_INSTANCE -> "sptr"
; szzLogs : CHAR* optional, out -> "var"
; cbMax : DWORD -> "int"
; pcbActual : DWORD* optional, out -> "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 JetGetLogInfoInstanceA(JET_INSTANCE instance, CHAR* szzLogs, DWORD cbMax, DWORD* pcbActual)
#uselib "ESENT.dll"
#cfunc global JetGetLogInfoInstanceA "JetGetLogInfoInstanceA" intptr, var, int, var
; res = JetGetLogInfoInstanceA(instance, szzLogs, cbMax, pcbActual)
; instance : JET_INSTANCE -> "intptr"
; szzLogs : CHAR* optional, out -> "var"
; cbMax : DWORD -> "int"
; pcbActual : DWORD* optional, out -> "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")
	procJetGetLogInfoInstanceA = esent.NewProc("JetGetLogInfoInstanceA")
)

// instance (JET_INSTANCE), szzLogs (CHAR* optional, out), cbMax (DWORD), pcbActual (DWORD* optional, out)
r1, _, err := procJetGetLogInfoInstanceA.Call(
	uintptr(instance),
	uintptr(szzLogs),
	uintptr(cbMax),
	uintptr(pcbActual),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function JetGetLogInfoInstanceA(
  instance: NativeUInt;   // JET_INSTANCE
  szzLogs: Pointer;   // CHAR* optional, out
  cbMax: DWORD;   // DWORD
  pcbActual: Pointer   // DWORD* optional, out
): Integer; stdcall;
  external 'ESENT.dll' name 'JetGetLogInfoInstanceA';

result := DllCall("ESENT\JetGetLogInfoInstanceA"
    , "UPtr", instance   ; JET_INSTANCE
    , "Ptr", szzLogs   ; CHAR* optional, out
    , "UInt", cbMax   ; DWORD
    , "Ptr", pcbActual   ; DWORD* optional, out
    , "Int")   ; return: INT

●JetGetLogInfoInstanceA(instance, szzLogs, cbMax, pcbActual) = DLL("ESENT.dll", "int JetGetLogInfoInstanceA(int, void*, dword, void*)")
# 呼び出し: JetGetLogInfoInstanceA(instance, szzLogs, cbMax, pcbActual)
# instance : JET_INSTANCE -> "int"
# szzLogs : CHAR* optional, out -> "void*"
# cbMax : DWORD -> "dword"
# pcbActual : DWORD* optional, out -> "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)。