SQLGetFunctions

// ODBC32.dll
#include <windows.h>

SHORT SQLGetFunctions(
    void* ConnectionHandle,
    WORD FunctionId,
    WORD* Supported   // optional
);

<DllImport("ODBC32.dll", ExactSpelling:=True)>
Public Shared Function SQLGetFunctions(
    ConnectionHandle As IntPtr,   ' void* in/out
    FunctionId As UShort,   ' WORD
    Supported As IntPtr   ' WORD* optional, out
) As Short
End Function

' ConnectionHandle : void* in/out
' FunctionId : WORD
' Supported : WORD* optional, out
Declare PtrSafe Function SQLGetFunctions Lib "odbc32" ( _
    ByVal ConnectionHandle As LongPtr, _
    ByVal FunctionId As Integer, _
    ByVal Supported As LongPtr) As Integer
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SQLGetFunctions = ctypes.windll.odbc32.SQLGetFunctions
SQLGetFunctions.restype = ctypes.c_short
SQLGetFunctions.argtypes = [
    ctypes.POINTER(None),  # ConnectionHandle : void* in/out
    ctypes.c_ushort,  # FunctionId : WORD
    ctypes.POINTER(ctypes.c_ushort),  # Supported : WORD* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLGetFunctions = Fiddle::Function.new(
  lib['SQLGetFunctions'],
  [
    Fiddle::TYPE_VOIDP,  # ConnectionHandle : void* in/out
    -Fiddle::TYPE_SHORT,  # FunctionId : WORD
    Fiddle::TYPE_VOIDP,  # Supported : WORD* optional, out
  ],
  Fiddle::TYPE_SHORT)

#[link(name = "odbc32")]
extern "system" {
    fn SQLGetFunctions(
        ConnectionHandle: *mut (),  // void* in/out
        FunctionId: u16,  // WORD
        Supported: *mut u16  // WORD* optional, out
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ODBC32.dll")]
public static extern short SQLGetFunctions(IntPtr ConnectionHandle, ushort FunctionId, IntPtr Supported);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLGetFunctions' -Namespace Win32 -PassThru
# $api::SQLGetFunctions(ConnectionHandle, FunctionId, Supported)

#uselib "ODBC32.dll"
#func global SQLGetFunctions "SQLGetFunctions" sptr, sptr, sptr
; SQLGetFunctions ConnectionHandle, FunctionId, varptr(Supported)   ; 戻り値は stat
; ConnectionHandle : void* in/out -> "sptr"
; FunctionId : WORD -> "sptr"
; Supported : WORD* 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。

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

var (
	odbc32 = windows.NewLazySystemDLL("ODBC32.dll")
	procSQLGetFunctions = odbc32.NewProc("SQLGetFunctions")
)

// ConnectionHandle (void* in/out), FunctionId (WORD), Supported (WORD* optional, out)
r1, _, err := procSQLGetFunctions.Call(
	uintptr(ConnectionHandle),
	uintptr(FunctionId),
	uintptr(Supported),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLGetFunctions(
  ConnectionHandle: Pointer;   // void* in/out
  FunctionId: Word;   // WORD
  Supported: Pointer   // WORD* optional, out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLGetFunctions';

result := DllCall("ODBC32\SQLGetFunctions"
    , "Ptr", ConnectionHandle   ; void* in/out
    , "UShort", FunctionId   ; WORD
    , "Ptr", Supported   ; WORD* optional, out
    , "Short")   ; return: SHORT

●SQLGetFunctions(ConnectionHandle, FunctionId, Supported) = DLL("ODBC32.dll", "int SQLGetFunctions(void*, int, void*)")
# 呼び出し: SQLGetFunctions(ConnectionHandle, FunctionId, Supported)
# ConnectionHandle : void* in/out -> "void*"
# FunctionId : WORD -> "int"
# Supported : WORD* 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)。

const std = @import("std");

extern "odbc32" fn SQLGetFunctions(
    ConnectionHandle: ?*anyopaque, // void* in/out
    FunctionId: u16, // WORD
    Supported: [*c]u16 // WORD* optional, out
) callconv(std.os.windows.WINAPI) i16;

proc SQLGetFunctions(
    ConnectionHandle: pointer,  # void* in/out
    FunctionId: uint16,  # WORD
    Supported: ptr uint16  # WORD* optional, out
): int16 {.importc: "SQLGetFunctions", stdcall, dynlib: "ODBC32.dll".}

pragma(lib, "odbc32");
extern(Windows)
short SQLGetFunctions(
    void* ConnectionHandle,   // void* in/out
    ushort FunctionId,   // WORD
    ushort* Supported   // WORD* optional, out
);

ccall((:SQLGetFunctions, "ODBC32.dll"), stdcall, Int16,
      (Ptr{Cvoid}, UInt16, Ptr{UInt16}),
      ConnectionHandle, FunctionId, Supported)
# ConnectionHandle : void* in/out -> Ptr{Cvoid}
# FunctionId : WORD -> UInt16
# Supported : WORD* optional, out -> Ptr{UInt16}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int16_t SQLGetFunctions(
    void* ConnectionHandle,
    uint16_t FunctionId,
    uint16_t* Supported);
]]
local odbc32 = ffi.load("odbc32")
-- odbc32.SQLGetFunctions(ConnectionHandle, FunctionId, Supported)
-- ConnectionHandle : void* in/out
-- FunctionId : WORD
-- Supported : WORD* optional, out
-- 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 SQLGetFunctions = lib.func('__stdcall', 'SQLGetFunctions', 'int16_t', ['void *', 'uint16_t', 'uint16_t *']);
// SQLGetFunctions(ConnectionHandle, FunctionId, Supported)
// ConnectionHandle : void* in/out -> 'void *'
// FunctionId : WORD -> 'uint16_t'
// Supported : WORD* optional, out -> 'uint16_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", {
  SQLGetFunctions: { parameters: ["pointer", "u16", "pointer"], result: "i16" },
});
// lib.symbols.SQLGetFunctions(ConnectionHandle, FunctionId, Supported)
// ConnectionHandle : void* in/out -> "pointer"
// FunctionId : WORD -> "u16"
// Supported : WORD* optional, out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int16_t SQLGetFunctions(
    void* ConnectionHandle,
    uint16_t FunctionId,
    uint16_t* Supported);
C, "ODBC32.dll");
// $ffi->SQLGetFunctions(ConnectionHandle, FunctionId, Supported);
// ConnectionHandle : void* in/out
// FunctionId : WORD
// Supported : WORD* optional, out
// 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);
    short SQLGetFunctions(
        Pointer ConnectionHandle,   // void* in/out
        short FunctionId,   // WORD
        ShortByReference Supported   // WORD* optional, out
    );
}

@[Link("odbc32")]
lib LibODBC32
  fun SQLGetFunctions = SQLGetFunctions(
    ConnectionHandle : Void*,   # void* in/out
    FunctionId : UInt16,   # WORD
    Supported : UInt16*   # WORD* optional, out
  ) : 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 SQLGetFunctionsNative = Int16 Function(Pointer<Void>, Uint16, Pointer<Uint16>);
typedef SQLGetFunctionsDart = int Function(Pointer<Void>, int, Pointer<Uint16>);
final SQLGetFunctions = DynamicLibrary.open('ODBC32.dll')
    .lookupFunction<SQLGetFunctionsNative, SQLGetFunctionsDart>('SQLGetFunctions');
// ConnectionHandle : void* in/out -> Pointer<Void>
// FunctionId : WORD -> Uint16
// Supported : WORD* optional, out -> Pointer<Uint16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SQLGetFunctions(
  ConnectionHandle: Pointer;   // void* in/out
  FunctionId: Word;   // WORD
  Supported: Pointer   // WORD* optional, out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLGetFunctions';

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

foreign import stdcall safe "SQLGetFunctions"
  c_SQLGetFunctions :: Ptr () -> Word16 -> Ptr Word16 -> IO Int16
-- ConnectionHandle : void* in/out -> Ptr ()
-- FunctionId : WORD -> Word16
-- Supported : WORD* optional, out -> Ptr Word16
-- 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 sqlgetfunctions =
  foreign "SQLGetFunctions"
    ((ptr void) @-> uint16_t @-> (ptr uint16_t) @-> returning int16_t)
(* ConnectionHandle : void* in/out -> (ptr void) *)
(* FunctionId : WORD -> uint16_t *)
(* Supported : WORD* optional, out -> (ptr uint16_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 ("SQLGetFunctions" sqlget-functions :convention :stdcall) :int16
  (connection-handle :pointer)   ; void* in/out
  (function-id :uint16)   ; WORD
  (supported :pointer))   ; WORD* optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $SQLGetFunctions = Win32::API::More->new('ODBC32',
    'short SQLGetFunctions(LPVOID ConnectionHandle, WORD FunctionId, LPVOID Supported)');
# my $ret = $SQLGetFunctions->Call($ConnectionHandle, $FunctionId, $Supported);
# ConnectionHandle : void* in/out -> LPVOID
# FunctionId : WORD -> WORD
# Supported : WORD* optional, out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。