SQLForeignKeysA

// ODBC32.dll  (ANSI / -A)
#include <windows.h>

SHORT SQLForeignKeysA(
    void* hstmt,
    BYTE* szPkCatalogName,   // optional
    SHORT cbPkCatalogName,
    BYTE* szPkSchemaName,   // optional
    SHORT cbPkSchemaName,
    BYTE* szPkTableName,   // optional
    SHORT cbPkTableName,
    BYTE* szFkCatalogName,   // optional
    SHORT cbFkCatalogName,
    BYTE* szFkSchemaName,   // optional
    SHORT cbFkSchemaName,
    BYTE* szFkTableName,   // optional
    SHORT cbFkTableName
);

<DllImport("ODBC32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SQLForeignKeysA(
    hstmt As IntPtr,   ' void* in/out
    szPkCatalogName As IntPtr,   ' BYTE* optional
    cbPkCatalogName As Short,   ' SHORT
    szPkSchemaName As IntPtr,   ' BYTE* optional
    cbPkSchemaName As Short,   ' SHORT
    szPkTableName As IntPtr,   ' BYTE* optional
    cbPkTableName As Short,   ' SHORT
    szFkCatalogName As IntPtr,   ' BYTE* optional
    cbFkCatalogName As Short,   ' SHORT
    szFkSchemaName As IntPtr,   ' BYTE* optional
    cbFkSchemaName As Short,   ' SHORT
    szFkTableName As IntPtr,   ' BYTE* optional
    cbFkTableName As Short   ' SHORT
) As Short
End Function

' hstmt : void* in/out
' szPkCatalogName : BYTE* optional
' cbPkCatalogName : SHORT
' szPkSchemaName : BYTE* optional
' cbPkSchemaName : SHORT
' szPkTableName : BYTE* optional
' cbPkTableName : SHORT
' szFkCatalogName : BYTE* optional
' cbFkCatalogName : SHORT
' szFkSchemaName : BYTE* optional
' cbFkSchemaName : SHORT
' szFkTableName : BYTE* optional
' cbFkTableName : SHORT
Declare PtrSafe Function SQLForeignKeysA Lib "odbc32" ( _
    ByVal hstmt As LongPtr, _
    ByVal szPkCatalogName As LongPtr, _
    ByVal cbPkCatalogName As Integer, _
    ByVal szPkSchemaName As LongPtr, _
    ByVal cbPkSchemaName As Integer, _
    ByVal szPkTableName As LongPtr, _
    ByVal cbPkTableName As Integer, _
    ByVal szFkCatalogName As LongPtr, _
    ByVal cbFkCatalogName As Integer, _
    ByVal szFkSchemaName As LongPtr, _
    ByVal cbFkSchemaName As Integer, _
    ByVal szFkTableName As LongPtr, _
    ByVal cbFkTableName As Integer) As Integer
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SQLForeignKeysA = ctypes.windll.odbc32.SQLForeignKeysA
SQLForeignKeysA.restype = ctypes.c_short
SQLForeignKeysA.argtypes = [
    ctypes.POINTER(None),  # hstmt : void* in/out
    ctypes.POINTER(ctypes.c_ubyte),  # szPkCatalogName : BYTE* optional
    ctypes.c_short,  # cbPkCatalogName : SHORT
    ctypes.POINTER(ctypes.c_ubyte),  # szPkSchemaName : BYTE* optional
    ctypes.c_short,  # cbPkSchemaName : SHORT
    ctypes.POINTER(ctypes.c_ubyte),  # szPkTableName : BYTE* optional
    ctypes.c_short,  # cbPkTableName : SHORT
    ctypes.POINTER(ctypes.c_ubyte),  # szFkCatalogName : BYTE* optional
    ctypes.c_short,  # cbFkCatalogName : SHORT
    ctypes.POINTER(ctypes.c_ubyte),  # szFkSchemaName : BYTE* optional
    ctypes.c_short,  # cbFkSchemaName : SHORT
    ctypes.POINTER(ctypes.c_ubyte),  # szFkTableName : BYTE* optional
    ctypes.c_short,  # cbFkTableName : SHORT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLForeignKeysA = Fiddle::Function.new(
  lib['SQLForeignKeysA'],
  [
    Fiddle::TYPE_VOIDP,  # hstmt : void* in/out
    Fiddle::TYPE_VOIDP,  # szPkCatalogName : BYTE* optional
    Fiddle::TYPE_SHORT,  # cbPkCatalogName : SHORT
    Fiddle::TYPE_VOIDP,  # szPkSchemaName : BYTE* optional
    Fiddle::TYPE_SHORT,  # cbPkSchemaName : SHORT
    Fiddle::TYPE_VOIDP,  # szPkTableName : BYTE* optional
    Fiddle::TYPE_SHORT,  # cbPkTableName : SHORT
    Fiddle::TYPE_VOIDP,  # szFkCatalogName : BYTE* optional
    Fiddle::TYPE_SHORT,  # cbFkCatalogName : SHORT
    Fiddle::TYPE_VOIDP,  # szFkSchemaName : BYTE* optional
    Fiddle::TYPE_SHORT,  # cbFkSchemaName : SHORT
    Fiddle::TYPE_VOIDP,  # szFkTableName : BYTE* optional
    Fiddle::TYPE_SHORT,  # cbFkTableName : SHORT
  ],
  Fiddle::TYPE_SHORT)

#[link(name = "odbc32")]
extern "system" {
    fn SQLForeignKeysA(
        hstmt: *mut (),  // void* in/out
        szPkCatalogName: *mut u8,  // BYTE* optional
        cbPkCatalogName: i16,  // SHORT
        szPkSchemaName: *mut u8,  // BYTE* optional
        cbPkSchemaName: i16,  // SHORT
        szPkTableName: *mut u8,  // BYTE* optional
        cbPkTableName: i16,  // SHORT
        szFkCatalogName: *mut u8,  // BYTE* optional
        cbFkCatalogName: i16,  // SHORT
        szFkSchemaName: *mut u8,  // BYTE* optional
        cbFkSchemaName: i16,  // SHORT
        szFkTableName: *mut u8,  // BYTE* optional
        cbFkTableName: i16  // SHORT
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ODBC32.dll", CharSet = CharSet.Ansi)]
public static extern short SQLForeignKeysA(IntPtr hstmt, IntPtr szPkCatalogName, short cbPkCatalogName, IntPtr szPkSchemaName, short cbPkSchemaName, IntPtr szPkTableName, short cbPkTableName, IntPtr szFkCatalogName, short cbFkCatalogName, IntPtr szFkSchemaName, short cbFkSchemaName, IntPtr szFkTableName, short cbFkTableName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLForeignKeysA' -Namespace Win32 -PassThru
# $api::SQLForeignKeysA(hstmt, szPkCatalogName, cbPkCatalogName, szPkSchemaName, cbPkSchemaName, szPkTableName, cbPkTableName, szFkCatalogName, cbFkCatalogName, szFkSchemaName, cbFkSchemaName, szFkTableName, cbFkTableName)

#uselib "ODBC32.dll"
#func global SQLForeignKeysA "SQLForeignKeysA" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; SQLForeignKeysA hstmt, varptr(szPkCatalogName), cbPkCatalogName, varptr(szPkSchemaName), cbPkSchemaName, varptr(szPkTableName), cbPkTableName, varptr(szFkCatalogName), cbFkCatalogName, varptr(szFkSchemaName), cbFkSchemaName, varptr(szFkTableName), cbFkTableName   ; 戻り値は stat
; hstmt : void* in/out -> "sptr"
; szPkCatalogName : BYTE* optional -> "sptr"
; cbPkCatalogName : SHORT -> "sptr"
; szPkSchemaName : BYTE* optional -> "sptr"
; cbPkSchemaName : SHORT -> "sptr"
; szPkTableName : BYTE* optional -> "sptr"
; cbPkTableName : SHORT -> "sptr"
; szFkCatalogName : BYTE* optional -> "sptr"
; cbFkCatalogName : SHORT -> "sptr"
; szFkSchemaName : BYTE* optional -> "sptr"
; cbFkSchemaName : SHORT -> "sptr"
; szFkTableName : BYTE* optional -> "sptr"
; cbFkTableName : SHORT -> "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。

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

var (
	odbc32 = windows.NewLazySystemDLL("ODBC32.dll")
	procSQLForeignKeysA = odbc32.NewProc("SQLForeignKeysA")
)

// hstmt (void* in/out), szPkCatalogName (BYTE* optional), cbPkCatalogName (SHORT), szPkSchemaName (BYTE* optional), cbPkSchemaName (SHORT), szPkTableName (BYTE* optional), cbPkTableName (SHORT), szFkCatalogName (BYTE* optional), cbFkCatalogName (SHORT), szFkSchemaName (BYTE* optional), cbFkSchemaName (SHORT), szFkTableName (BYTE* optional), cbFkTableName (SHORT)
r1, _, err := procSQLForeignKeysA.Call(
	uintptr(hstmt),
	uintptr(szPkCatalogName),
	uintptr(cbPkCatalogName),
	uintptr(szPkSchemaName),
	uintptr(cbPkSchemaName),
	uintptr(szPkTableName),
	uintptr(cbPkTableName),
	uintptr(szFkCatalogName),
	uintptr(cbFkCatalogName),
	uintptr(szFkSchemaName),
	uintptr(cbFkSchemaName),
	uintptr(szFkTableName),
	uintptr(cbFkTableName),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLForeignKeysA(
  hstmt: Pointer;   // void* in/out
  szPkCatalogName: Pointer;   // BYTE* optional
  cbPkCatalogName: Smallint;   // SHORT
  szPkSchemaName: Pointer;   // BYTE* optional
  cbPkSchemaName: Smallint;   // SHORT
  szPkTableName: Pointer;   // BYTE* optional
  cbPkTableName: Smallint;   // SHORT
  szFkCatalogName: Pointer;   // BYTE* optional
  cbFkCatalogName: Smallint;   // SHORT
  szFkSchemaName: Pointer;   // BYTE* optional
  cbFkSchemaName: Smallint;   // SHORT
  szFkTableName: Pointer;   // BYTE* optional
  cbFkTableName: Smallint   // SHORT
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLForeignKeysA';

result := DllCall("ODBC32\SQLForeignKeysA"
    , "Ptr", hstmt   ; void* in/out
    , "Ptr", szPkCatalogName   ; BYTE* optional
    , "Short", cbPkCatalogName   ; SHORT
    , "Ptr", szPkSchemaName   ; BYTE* optional
    , "Short", cbPkSchemaName   ; SHORT
    , "Ptr", szPkTableName   ; BYTE* optional
    , "Short", cbPkTableName   ; SHORT
    , "Ptr", szFkCatalogName   ; BYTE* optional
    , "Short", cbFkCatalogName   ; SHORT
    , "Ptr", szFkSchemaName   ; BYTE* optional
    , "Short", cbFkSchemaName   ; SHORT
    , "Ptr", szFkTableName   ; BYTE* optional
    , "Short", cbFkTableName   ; SHORT
    , "Short")   ; return: SHORT

●SQLForeignKeysA(hstmt, szPkCatalogName, cbPkCatalogName, szPkSchemaName, cbPkSchemaName, szPkTableName, cbPkTableName, szFkCatalogName, cbFkCatalogName, szFkSchemaName, cbFkSchemaName, szFkTableName, cbFkTableName) = DLL("ODBC32.dll", "int SQLForeignKeysA(void*, void*, int, void*, int, void*, int, void*, int, void*, int, void*, int)")
# 呼び出し: SQLForeignKeysA(hstmt, szPkCatalogName, cbPkCatalogName, szPkSchemaName, cbPkSchemaName, szPkTableName, cbPkTableName, szFkCatalogName, cbFkCatalogName, szFkSchemaName, cbFkSchemaName, szFkTableName, cbFkTableName)
# hstmt : void* in/out -> "void*"
# szPkCatalogName : BYTE* optional -> "void*"
# cbPkCatalogName : SHORT -> "int"
# szPkSchemaName : BYTE* optional -> "void*"
# cbPkSchemaName : SHORT -> "int"
# szPkTableName : BYTE* optional -> "void*"
# cbPkTableName : SHORT -> "int"
# szFkCatalogName : BYTE* optional -> "void*"
# cbFkCatalogName : SHORT -> "int"
# szFkSchemaName : BYTE* optional -> "void*"
# cbFkSchemaName : SHORT -> "int"
# szFkTableName : BYTE* optional -> "void*"
# cbFkTableName : SHORT -> "int"
# 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)。

const std = @import("std");

extern "odbc32" fn SQLForeignKeysA(
    hstmt: ?*anyopaque, // void* in/out
    szPkCatalogName: [*c]u8, // BYTE* optional
    cbPkCatalogName: i16, // SHORT
    szPkSchemaName: [*c]u8, // BYTE* optional
    cbPkSchemaName: i16, // SHORT
    szPkTableName: [*c]u8, // BYTE* optional
    cbPkTableName: i16, // SHORT
    szFkCatalogName: [*c]u8, // BYTE* optional
    cbFkCatalogName: i16, // SHORT
    szFkSchemaName: [*c]u8, // BYTE* optional
    cbFkSchemaName: i16, // SHORT
    szFkTableName: [*c]u8, // BYTE* optional
    cbFkTableName: i16 // SHORT
) callconv(std.os.windows.WINAPI) i16;

proc SQLForeignKeysA(
    hstmt: pointer,  # void* in/out
    szPkCatalogName: ptr uint8,  # BYTE* optional
    cbPkCatalogName: int16,  # SHORT
    szPkSchemaName: ptr uint8,  # BYTE* optional
    cbPkSchemaName: int16,  # SHORT
    szPkTableName: ptr uint8,  # BYTE* optional
    cbPkTableName: int16,  # SHORT
    szFkCatalogName: ptr uint8,  # BYTE* optional
    cbFkCatalogName: int16,  # SHORT
    szFkSchemaName: ptr uint8,  # BYTE* optional
    cbFkSchemaName: int16,  # SHORT
    szFkTableName: ptr uint8,  # BYTE* optional
    cbFkTableName: int16  # SHORT
): int16 {.importc: "SQLForeignKeysA", stdcall, dynlib: "ODBC32.dll".}

pragma(lib, "odbc32");
extern(Windows)
short SQLForeignKeysA(
    void* hstmt,   // void* in/out
    ubyte* szPkCatalogName,   // BYTE* optional
    short cbPkCatalogName,   // SHORT
    ubyte* szPkSchemaName,   // BYTE* optional
    short cbPkSchemaName,   // SHORT
    ubyte* szPkTableName,   // BYTE* optional
    short cbPkTableName,   // SHORT
    ubyte* szFkCatalogName,   // BYTE* optional
    short cbFkCatalogName,   // SHORT
    ubyte* szFkSchemaName,   // BYTE* optional
    short cbFkSchemaName,   // SHORT
    ubyte* szFkTableName,   // BYTE* optional
    short cbFkTableName   // SHORT
);

ccall((:SQLForeignKeysA, "ODBC32.dll"), stdcall, Int16,
      (Ptr{Cvoid}, Ptr{UInt8}, Int16, Ptr{UInt8}, Int16, Ptr{UInt8}, Int16, Ptr{UInt8}, Int16, Ptr{UInt8}, Int16, Ptr{UInt8}, Int16),
      hstmt, szPkCatalogName, cbPkCatalogName, szPkSchemaName, cbPkSchemaName, szPkTableName, cbPkTableName, szFkCatalogName, cbFkCatalogName, szFkSchemaName, cbFkSchemaName, szFkTableName, cbFkTableName)
# hstmt : void* in/out -> Ptr{Cvoid}
# szPkCatalogName : BYTE* optional -> Ptr{UInt8}
# cbPkCatalogName : SHORT -> Int16
# szPkSchemaName : BYTE* optional -> Ptr{UInt8}
# cbPkSchemaName : SHORT -> Int16
# szPkTableName : BYTE* optional -> Ptr{UInt8}
# cbPkTableName : SHORT -> Int16
# szFkCatalogName : BYTE* optional -> Ptr{UInt8}
# cbFkCatalogName : SHORT -> Int16
# szFkSchemaName : BYTE* optional -> Ptr{UInt8}
# cbFkSchemaName : SHORT -> Int16
# szFkTableName : BYTE* optional -> Ptr{UInt8}
# cbFkTableName : SHORT -> Int16
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int16_t SQLForeignKeysA(
    void* hstmt,
    uint8_t* szPkCatalogName,
    int16_t cbPkCatalogName,
    uint8_t* szPkSchemaName,
    int16_t cbPkSchemaName,
    uint8_t* szPkTableName,
    int16_t cbPkTableName,
    uint8_t* szFkCatalogName,
    int16_t cbFkCatalogName,
    uint8_t* szFkSchemaName,
    int16_t cbFkSchemaName,
    uint8_t* szFkTableName,
    int16_t cbFkTableName);
]]
local odbc32 = ffi.load("odbc32")
-- odbc32.SQLForeignKeysA(hstmt, szPkCatalogName, cbPkCatalogName, szPkSchemaName, cbPkSchemaName, szPkTableName, cbPkTableName, szFkCatalogName, cbFkCatalogName, szFkSchemaName, cbFkSchemaName, szFkTableName, cbFkTableName)
-- hstmt : void* in/out
-- szPkCatalogName : BYTE* optional
-- cbPkCatalogName : SHORT
-- szPkSchemaName : BYTE* optional
-- cbPkSchemaName : SHORT
-- szPkTableName : BYTE* optional
-- cbPkTableName : SHORT
-- szFkCatalogName : BYTE* optional
-- cbFkCatalogName : SHORT
-- szFkSchemaName : BYTE* optional
-- cbFkSchemaName : SHORT
-- szFkTableName : BYTE* optional
-- cbFkTableName : SHORT
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('ODBC32.dll');
const SQLForeignKeysA = lib.func('__stdcall', 'SQLForeignKeysA', 'int16_t', ['void *', 'uint8_t *', 'int16_t', 'uint8_t *', 'int16_t', 'uint8_t *', 'int16_t', 'uint8_t *', 'int16_t', 'uint8_t *', 'int16_t', 'uint8_t *', 'int16_t']);
// SQLForeignKeysA(hstmt, szPkCatalogName, cbPkCatalogName, szPkSchemaName, cbPkSchemaName, szPkTableName, cbPkTableName, szFkCatalogName, cbFkCatalogName, szFkSchemaName, cbFkSchemaName, szFkTableName, cbFkTableName)
// hstmt : void* in/out -> 'void *'
// szPkCatalogName : BYTE* optional -> 'uint8_t *'
// cbPkCatalogName : SHORT -> 'int16_t'
// szPkSchemaName : BYTE* optional -> 'uint8_t *'
// cbPkSchemaName : SHORT -> 'int16_t'
// szPkTableName : BYTE* optional -> 'uint8_t *'
// cbPkTableName : SHORT -> 'int16_t'
// szFkCatalogName : BYTE* optional -> 'uint8_t *'
// cbFkCatalogName : SHORT -> 'int16_t'
// szFkSchemaName : BYTE* optional -> 'uint8_t *'
// cbFkSchemaName : SHORT -> 'int16_t'
// szFkTableName : BYTE* optional -> 'uint8_t *'
// cbFkTableName : SHORT -> 'int16_t'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("ODBC32.dll", {
  SQLForeignKeysA: { parameters: ["pointer", "pointer", "i16", "pointer", "i16", "pointer", "i16", "pointer", "i16", "pointer", "i16", "pointer", "i16"], result: "i16" },
});
// lib.symbols.SQLForeignKeysA(hstmt, szPkCatalogName, cbPkCatalogName, szPkSchemaName, cbPkSchemaName, szPkTableName, cbPkTableName, szFkCatalogName, cbFkCatalogName, szFkSchemaName, cbFkSchemaName, szFkTableName, cbFkTableName)
// hstmt : void* in/out -> "pointer"
// szPkCatalogName : BYTE* optional -> "pointer"
// cbPkCatalogName : SHORT -> "i16"
// szPkSchemaName : BYTE* optional -> "pointer"
// cbPkSchemaName : SHORT -> "i16"
// szPkTableName : BYTE* optional -> "pointer"
// cbPkTableName : SHORT -> "i16"
// szFkCatalogName : BYTE* optional -> "pointer"
// cbFkCatalogName : SHORT -> "i16"
// szFkSchemaName : BYTE* optional -> "pointer"
// cbFkSchemaName : SHORT -> "i16"
// szFkTableName : BYTE* optional -> "pointer"
// cbFkTableName : SHORT -> "i16"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int16_t SQLForeignKeysA(
    void* hstmt,
    uint8_t* szPkCatalogName,
    int16_t cbPkCatalogName,
    uint8_t* szPkSchemaName,
    int16_t cbPkSchemaName,
    uint8_t* szPkTableName,
    int16_t cbPkTableName,
    uint8_t* szFkCatalogName,
    int16_t cbFkCatalogName,
    uint8_t* szFkSchemaName,
    int16_t cbFkSchemaName,
    uint8_t* szFkTableName,
    int16_t cbFkTableName);
C, "ODBC32.dll");
// $ffi->SQLForeignKeysA(hstmt, szPkCatalogName, cbPkCatalogName, szPkSchemaName, cbPkSchemaName, szPkTableName, cbPkTableName, szFkCatalogName, cbFkCatalogName, szFkSchemaName, cbFkSchemaName, szFkTableName, cbFkTableName);
// hstmt : void* in/out
// szPkCatalogName : BYTE* optional
// cbPkCatalogName : SHORT
// szPkSchemaName : BYTE* optional
// cbPkSchemaName : SHORT
// szPkTableName : BYTE* optional
// cbPkTableName : SHORT
// szFkCatalogName : BYTE* optional
// cbFkCatalogName : SHORT
// szFkSchemaName : BYTE* optional
// cbFkSchemaName : SHORT
// szFkTableName : BYTE* optional
// cbFkTableName : SHORT
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Odbc32 extends StdCallLibrary {
    Odbc32 INSTANCE = Native.load("odbc32", Odbc32.class, W32APIOptions.ASCII_OPTIONS);
    short SQLForeignKeysA(
        Pointer hstmt,   // void* in/out
        byte[] szPkCatalogName,   // BYTE* optional
        short cbPkCatalogName,   // SHORT
        byte[] szPkSchemaName,   // BYTE* optional
        short cbPkSchemaName,   // SHORT
        byte[] szPkTableName,   // BYTE* optional
        short cbPkTableName,   // SHORT
        byte[] szFkCatalogName,   // BYTE* optional
        short cbFkCatalogName,   // SHORT
        byte[] szFkSchemaName,   // BYTE* optional
        short cbFkSchemaName,   // SHORT
        byte[] szFkTableName,   // BYTE* optional
        short cbFkTableName   // SHORT
    );
}

@[Link("odbc32")]
lib LibODBC32
  fun SQLForeignKeysA = SQLForeignKeysA(
    hstmt : Void*,   # void* in/out
    szPkCatalogName : UInt8*,   # BYTE* optional
    cbPkCatalogName : Int16,   # SHORT
    szPkSchemaName : UInt8*,   # BYTE* optional
    cbPkSchemaName : Int16,   # SHORT
    szPkTableName : UInt8*,   # BYTE* optional
    cbPkTableName : Int16,   # SHORT
    szFkCatalogName : UInt8*,   # BYTE* optional
    cbFkCatalogName : Int16,   # SHORT
    szFkSchemaName : UInt8*,   # BYTE* optional
    cbFkSchemaName : Int16,   # SHORT
    szFkTableName : UInt8*,   # BYTE* optional
    cbFkTableName : Int16   # SHORT
  ) : Int16
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef SQLForeignKeysANative = Int16 Function(Pointer<Void>, Pointer<Uint8>, Int16, Pointer<Uint8>, Int16, Pointer<Uint8>, Int16, Pointer<Uint8>, Int16, Pointer<Uint8>, Int16, Pointer<Uint8>, Int16);
typedef SQLForeignKeysADart = int Function(Pointer<Void>, Pointer<Uint8>, int, Pointer<Uint8>, int, Pointer<Uint8>, int, Pointer<Uint8>, int, Pointer<Uint8>, int, Pointer<Uint8>, int);
final SQLForeignKeysA = DynamicLibrary.open('ODBC32.dll')
    .lookupFunction<SQLForeignKeysANative, SQLForeignKeysADart>('SQLForeignKeysA');
// hstmt : void* in/out -> Pointer<Void>
// szPkCatalogName : BYTE* optional -> Pointer<Uint8>
// cbPkCatalogName : SHORT -> Int16
// szPkSchemaName : BYTE* optional -> Pointer<Uint8>
// cbPkSchemaName : SHORT -> Int16
// szPkTableName : BYTE* optional -> Pointer<Uint8>
// cbPkTableName : SHORT -> Int16
// szFkCatalogName : BYTE* optional -> Pointer<Uint8>
// cbFkCatalogName : SHORT -> Int16
// szFkSchemaName : BYTE* optional -> Pointer<Uint8>
// cbFkSchemaName : SHORT -> Int16
// szFkTableName : BYTE* optional -> Pointer<Uint8>
// cbFkTableName : SHORT -> Int16
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SQLForeignKeysA(
  hstmt: Pointer;   // void* in/out
  szPkCatalogName: Pointer;   // BYTE* optional
  cbPkCatalogName: Smallint;   // SHORT
  szPkSchemaName: Pointer;   // BYTE* optional
  cbPkSchemaName: Smallint;   // SHORT
  szPkTableName: Pointer;   // BYTE* optional
  cbPkTableName: Smallint;   // SHORT
  szFkCatalogName: Pointer;   // BYTE* optional
  cbFkCatalogName: Smallint;   // SHORT
  szFkSchemaName: Pointer;   // BYTE* optional
  cbFkSchemaName: Smallint;   // SHORT
  szFkTableName: Pointer;   // BYTE* optional
  cbFkTableName: Smallint   // SHORT
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLForeignKeysA';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "SQLForeignKeysA"
  c_SQLForeignKeysA :: Ptr () -> Ptr Word8 -> Int16 -> Ptr Word8 -> Int16 -> Ptr Word8 -> Int16 -> Ptr Word8 -> Int16 -> Ptr Word8 -> Int16 -> Ptr Word8 -> Int16 -> IO Int16
-- hstmt : void* in/out -> Ptr ()
-- szPkCatalogName : BYTE* optional -> Ptr Word8
-- cbPkCatalogName : SHORT -> Int16
-- szPkSchemaName : BYTE* optional -> Ptr Word8
-- cbPkSchemaName : SHORT -> Int16
-- szPkTableName : BYTE* optional -> Ptr Word8
-- cbPkTableName : SHORT -> Int16
-- szFkCatalogName : BYTE* optional -> Ptr Word8
-- cbFkCatalogName : SHORT -> Int16
-- szFkSchemaName : BYTE* optional -> Ptr Word8
-- cbFkSchemaName : SHORT -> Int16
-- szFkTableName : BYTE* optional -> Ptr Word8
-- cbFkTableName : SHORT -> Int16
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let sqlforeignkeysa =
  foreign "SQLForeignKeysA"
    ((ptr void) @-> (ptr uint8_t) @-> int16_t @-> (ptr uint8_t) @-> int16_t @-> (ptr uint8_t) @-> int16_t @-> (ptr uint8_t) @-> int16_t @-> (ptr uint8_t) @-> int16_t @-> (ptr uint8_t) @-> int16_t @-> returning int16_t)
(* hstmt : void* in/out -> (ptr void) *)
(* szPkCatalogName : BYTE* optional -> (ptr uint8_t) *)
(* cbPkCatalogName : SHORT -> int16_t *)
(* szPkSchemaName : BYTE* optional -> (ptr uint8_t) *)
(* cbPkSchemaName : SHORT -> int16_t *)
(* szPkTableName : BYTE* optional -> (ptr uint8_t) *)
(* cbPkTableName : SHORT -> int16_t *)
(* szFkCatalogName : BYTE* optional -> (ptr uint8_t) *)
(* cbFkCatalogName : SHORT -> int16_t *)
(* szFkSchemaName : BYTE* optional -> (ptr uint8_t) *)
(* cbFkSchemaName : SHORT -> int16_t *)
(* szFkTableName : BYTE* optional -> (ptr uint8_t) *)
(* cbFkTableName : SHORT -> int16_t *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library odbc32 (t "ODBC32.dll"))
(cffi:use-foreign-library odbc32)

(cffi:defcfun ("SQLForeignKeysA" sqlforeign-keys-a :convention :stdcall) :int16
  (hstmt :pointer)   ; void* in/out
  (sz-pk-catalog-name :pointer)   ; BYTE* optional
  (cb-pk-catalog-name :int16)   ; SHORT
  (sz-pk-schema-name :pointer)   ; BYTE* optional
  (cb-pk-schema-name :int16)   ; SHORT
  (sz-pk-table-name :pointer)   ; BYTE* optional
  (cb-pk-table-name :int16)   ; SHORT
  (sz-fk-catalog-name :pointer)   ; BYTE* optional
  (cb-fk-catalog-name :int16)   ; SHORT
  (sz-fk-schema-name :pointer)   ; BYTE* optional
  (cb-fk-schema-name :int16)   ; SHORT
  (sz-fk-table-name :pointer)   ; BYTE* optional
  (cb-fk-table-name :int16))   ; SHORT
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $SQLForeignKeysA = Win32::API::More->new('ODBC32',
    'short SQLForeignKeysA(LPVOID hstmt, LPVOID szPkCatalogName, short cbPkCatalogName, LPVOID szPkSchemaName, short cbPkSchemaName, LPVOID szPkTableName, short cbPkTableName, LPVOID szFkCatalogName, short cbFkCatalogName, LPVOID szFkSchemaName, short cbFkSchemaName, LPVOID szFkTableName, short cbFkTableName)');
# my $ret = $SQLForeignKeysA->Call($hstmt, $szPkCatalogName, $cbPkCatalogName, $szPkSchemaName, $cbPkSchemaName, $szPkTableName, $cbPkTableName, $szFkCatalogName, $cbFkCatalogName, $szFkSchemaName, $cbFkSchemaName, $szFkTableName, $cbFkTableName);
# hstmt : void* in/out -> LPVOID
# szPkCatalogName : BYTE* optional -> LPVOID
# cbPkCatalogName : SHORT -> short
# szPkSchemaName : BYTE* optional -> LPVOID
# cbPkSchemaName : SHORT -> short
# szPkTableName : BYTE* optional -> LPVOID
# cbPkTableName : SHORT -> short
# szFkCatalogName : BYTE* optional -> LPVOID
# cbFkCatalogName : SHORT -> short
# szFkSchemaName : BYTE* optional -> LPVOID
# cbFkSchemaName : SHORT -> short
# szFkTableName : BYTE* optional -> LPVOID
# cbFkTableName : SHORT -> short
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。