SQLAllocConnect

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

SHORT SQLAllocConnect(
    void* EnvironmentHandle,
    void** ConnectionHandle
);

<DllImport("ODBC32.dll", ExactSpelling:=True)>
Public Shared Function SQLAllocConnect(
    EnvironmentHandle As IntPtr,   ' void* in/out
    ConnectionHandle As IntPtr   ' void** out
) As Short
End Function

' EnvironmentHandle : void* in/out
' ConnectionHandle : void** out
Declare PtrSafe Function SQLAllocConnect Lib "odbc32" ( _
    ByVal EnvironmentHandle As LongPtr, _
    ByVal ConnectionHandle 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

SQLAllocConnect = ctypes.windll.odbc32.SQLAllocConnect
SQLAllocConnect.restype = ctypes.c_short
SQLAllocConnect.argtypes = [
    ctypes.POINTER(None),  # EnvironmentHandle : void* in/out
    ctypes.c_void_p,  # ConnectionHandle : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLAllocConnect = Fiddle::Function.new(
  lib['SQLAllocConnect'],
  [
    Fiddle::TYPE_VOIDP,  # EnvironmentHandle : void* in/out
    Fiddle::TYPE_VOIDP,  # ConnectionHandle : void** out
  ],
  Fiddle::TYPE_SHORT)

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

$sig = @"
[DllImport("ODBC32.dll")]
public static extern short SQLAllocConnect(IntPtr EnvironmentHandle, IntPtr ConnectionHandle);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLAllocConnect' -Namespace Win32 -PassThru
# $api::SQLAllocConnect(EnvironmentHandle, ConnectionHandle)

#uselib "ODBC32.dll"
#func global SQLAllocConnect "SQLAllocConnect" sptr, sptr
; SQLAllocConnect EnvironmentHandle, ConnectionHandle   ; 戻り値は stat
; EnvironmentHandle : void* in/out -> "sptr"
; ConnectionHandle : void** 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 "ODBC32.dll"
#cfunc global SQLAllocConnect "SQLAllocConnect" sptr, sptr
; res = SQLAllocConnect(EnvironmentHandle, ConnectionHandle)
; EnvironmentHandle : void* in/out -> "sptr"
; ConnectionHandle : void** out -> "sptr"

; SHORT SQLAllocConnect(void* EnvironmentHandle, void** ConnectionHandle)
#uselib "ODBC32.dll"
#cfunc global SQLAllocConnect "SQLAllocConnect" intptr, intptr
; res = SQLAllocConnect(EnvironmentHandle, ConnectionHandle)
; EnvironmentHandle : void* in/out -> "intptr"
; ConnectionHandle : void** out -> "intptr"

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

var (
	odbc32 = windows.NewLazySystemDLL("ODBC32.dll")
	procSQLAllocConnect = odbc32.NewProc("SQLAllocConnect")
)

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

function SQLAllocConnect(
  EnvironmentHandle: Pointer;   // void* in/out
  ConnectionHandle: Pointer   // void** out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLAllocConnect';

result := DllCall("ODBC32\SQLAllocConnect"
    , "Ptr", EnvironmentHandle   ; void* in/out
    , "Ptr", ConnectionHandle   ; void** out
    , "Short")   ; return: SHORT

●SQLAllocConnect(EnvironmentHandle, ConnectionHandle) = DLL("ODBC32.dll", "int SQLAllocConnect(void*, void*)")
# 呼び出し: SQLAllocConnect(EnvironmentHandle, ConnectionHandle)
# EnvironmentHandle : void* in/out -> "void*"
# ConnectionHandle : void** 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 SQLAllocConnect(
    EnvironmentHandle: ?*anyopaque, // void* in/out
    ConnectionHandle: ?*anyopaque // void** out
) callconv(std.os.windows.WINAPI) i16;

proc SQLAllocConnect(
    EnvironmentHandle: pointer,  # void* in/out
    ConnectionHandle: pointer  # void** out
): int16 {.importc: "SQLAllocConnect", stdcall, dynlib: "ODBC32.dll".}

pragma(lib, "odbc32");
extern(Windows)
short SQLAllocConnect(
    void* EnvironmentHandle,   // void* in/out
    void** ConnectionHandle   // void** out
);

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

local ffi = require("ffi")
ffi.cdef[[
int16_t SQLAllocConnect(
    void* EnvironmentHandle,
    void** ConnectionHandle);
]]
local odbc32 = ffi.load("odbc32")
-- odbc32.SQLAllocConnect(EnvironmentHandle, ConnectionHandle)
-- EnvironmentHandle : void* in/out
-- ConnectionHandle : void** 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 SQLAllocConnect = lib.func('__stdcall', 'SQLAllocConnect', 'int16_t', ['void *', 'void *']);
// SQLAllocConnect(EnvironmentHandle, ConnectionHandle)
// EnvironmentHandle : void* in/out -> 'void *'
// ConnectionHandle : void** out -> 'void *'
// 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", {
  SQLAllocConnect: { parameters: ["pointer", "pointer"], result: "i16" },
});
// lib.symbols.SQLAllocConnect(EnvironmentHandle, ConnectionHandle)
// EnvironmentHandle : void* in/out -> "pointer"
// ConnectionHandle : void** 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 SQLAllocConnect(
    void* EnvironmentHandle,
    void** ConnectionHandle);
C, "ODBC32.dll");
// $ffi->SQLAllocConnect(EnvironmentHandle, ConnectionHandle);
// EnvironmentHandle : void* in/out
// ConnectionHandle : void** 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 SQLAllocConnect(
        Pointer EnvironmentHandle,   // void* in/out
        Pointer ConnectionHandle   // void** out
    );
}

@[Link("odbc32")]
lib LibODBC32
  fun SQLAllocConnect = SQLAllocConnect(
    EnvironmentHandle : Void*,   # void* in/out
    ConnectionHandle : Void**   # void** 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 SQLAllocConnectNative = Int16 Function(Pointer<Void>, Pointer<Void>);
typedef SQLAllocConnectDart = int Function(Pointer<Void>, Pointer<Void>);
final SQLAllocConnect = DynamicLibrary.open('ODBC32.dll')
    .lookupFunction<SQLAllocConnectNative, SQLAllocConnectDart>('SQLAllocConnect');
// EnvironmentHandle : void* in/out -> Pointer<Void>
// ConnectionHandle : void** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SQLAllocConnect(
  EnvironmentHandle: Pointer;   // void* in/out
  ConnectionHandle: Pointer   // void** out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLAllocConnect';

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

foreign import stdcall safe "SQLAllocConnect"
  c_SQLAllocConnect :: Ptr () -> Ptr () -> IO Int16
-- EnvironmentHandle : void* in/out -> Ptr ()
-- ConnectionHandle : void** out -> Ptr ()
-- 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 sqlallocconnect =
  foreign "SQLAllocConnect"
    ((ptr void) @-> (ptr void) @-> returning int16_t)
(* EnvironmentHandle : void* in/out -> (ptr void) *)
(* ConnectionHandle : void** out -> (ptr void) *)
(* 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 ("SQLAllocConnect" sqlalloc-connect :convention :stdcall) :int16
  (environment-handle :pointer)   ; void* in/out
  (connection-handle :pointer))   ; void** out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

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