JetCreateInstanceA

関数

名前付きのESEデータベースインスタンスを作成する（ANSI版）。

DLLESENT.dll文字セットANSI (-A)呼出規約winapi

シグネチャ

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

INT JetCreateInstanceA(
    JET_INSTANCE* pinstance,
    CHAR* szInstanceName   // optional
);

パラメーター

名前	型	方向
pinstance	JET_INSTANCE*	out
szInstanceName	CHAR*	inoptional

戻り値の型: INT

各言語での呼び出し定義

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

INT JetCreateInstanceA(
    JET_INSTANCE* pinstance,
    CHAR* szInstanceName   // optional
);

[DllImport("ESENT.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern int JetCreateInstanceA(
    out UIntPtr pinstance,   // JET_INSTANCE* out
    IntPtr szInstanceName   // CHAR* optional
);

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

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

JetCreateInstanceA = ctypes.windll.esent.JetCreateInstanceA
JetCreateInstanceA.restype = ctypes.c_int
JetCreateInstanceA.argtypes = [
    ctypes.c_void_p,  # pinstance : JET_INSTANCE* out
    ctypes.POINTER(ctypes.c_byte),  # szInstanceName : CHAR* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ESENT.dll')
JetCreateInstanceA = Fiddle::Function.new(
  lib['JetCreateInstanceA'],
  [
    Fiddle::TYPE_VOIDP,  # pinstance : JET_INSTANCE* out
    Fiddle::TYPE_VOIDP,  # szInstanceName : CHAR* optional
  ],
  Fiddle::TYPE_INT)

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

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

#uselib "ESENT.dll"
#func global JetCreateInstanceA "JetCreateInstanceA" sptr, sptr
; JetCreateInstanceA pinstance, varptr(szInstanceName)   ; 戻り値は stat
; pinstance : JET_INSTANCE* out -> "sptr"
; szInstanceName : CHAR* optional -> "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。

出力引数:

#uselib "ESENT.dll"
#cfunc global JetCreateInstanceA "JetCreateInstanceA" int, var
; res = JetCreateInstanceA(pinstance, szInstanceName)
; pinstance : JET_INSTANCE* out -> "int"
; szInstanceName : CHAR* 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。#uselib "ESENT.dll"
#cfunc global JetCreateInstanceA "JetCreateInstanceA" int, sptr
; res = JetCreateInstanceA(pinstance, varptr(szInstanceName))
; pinstance : JET_INSTANCE* out -> "int"
; szInstanceName : CHAR* optional -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; INT JetCreateInstanceA(JET_INSTANCE* pinstance, CHAR* szInstanceName)
#uselib "ESENT.dll"
#cfunc global JetCreateInstanceA "JetCreateInstanceA" int, var
; res = JetCreateInstanceA(pinstance, szInstanceName)
; pinstance : JET_INSTANCE* out -> "int"
; szInstanceName : CHAR* 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 JetCreateInstanceA(JET_INSTANCE* pinstance, CHAR* szInstanceName)
#uselib "ESENT.dll"
#cfunc global JetCreateInstanceA "JetCreateInstanceA" int, intptr
; res = JetCreateInstanceA(pinstance, varptr(szInstanceName))
; pinstance : JET_INSTANCE* out -> "int"
; szInstanceName : CHAR* optional -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	esent = windows.NewLazySystemDLL("ESENT.dll")
	procJetCreateInstanceA = esent.NewProc("JetCreateInstanceA")
)

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

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

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

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