FaxGetPortA

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

BOOL FaxGetPortA(
    HANDLE FaxPortHandle,
    FAX_PORT_INFOA** PortInfo
);

<DllImport("WINFAX.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FaxGetPortA(
    FaxPortHandle As IntPtr,   ' HANDLE
    PortInfo As IntPtr   ' FAX_PORT_INFOA** out
) As Boolean
End Function

' FaxPortHandle : HANDLE
' PortInfo : FAX_PORT_INFOA** out
Declare PtrSafe Function FaxGetPortA Lib "winfax" ( _
    ByVal FaxPortHandle As LongPtr, _
    ByVal PortInfo 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

FaxGetPortA = ctypes.windll.winfax.FaxGetPortA
FaxGetPortA.restype = wintypes.BOOL
FaxGetPortA.argtypes = [
    wintypes.HANDLE,  # FaxPortHandle : HANDLE
    ctypes.c_void_p,  # PortInfo : FAX_PORT_INFOA** out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WINFAX.dll')
FaxGetPortA = Fiddle::Function.new(
  lib['FaxGetPortA'],
  [
    Fiddle::TYPE_VOIDP,  # FaxPortHandle : HANDLE
    Fiddle::TYPE_VOIDP,  # PortInfo : FAX_PORT_INFOA** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "winfax")]
extern "system" {
    fn FaxGetPortA(
        FaxPortHandle: *mut core::ffi::c_void,  // HANDLE
        PortInfo: *mut *mut FAX_PORT_INFOA  // FAX_PORT_INFOA** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WINFAX.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool FaxGetPortA(IntPtr FaxPortHandle, IntPtr PortInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WINFAX_FaxGetPortA' -Namespace Win32 -PassThru
# $api::FaxGetPortA(FaxPortHandle, PortInfo)

#uselib "WINFAX.dll"
#func global FaxGetPortA "FaxGetPortA" sptr, sptr
; FaxGetPortA FaxPortHandle, varptr(PortInfo)   ; 戻り値は stat
; FaxPortHandle : HANDLE -> "sptr"
; PortInfo : FAX_PORT_INFOA** 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 "WINFAX.dll"
#cfunc global FaxGetPortA "FaxGetPortA" sptr, var
; res = FaxGetPortA(FaxPortHandle, PortInfo)
; FaxPortHandle : HANDLE -> "sptr"
; PortInfo : FAX_PORT_INFOA** 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。

; BOOL FaxGetPortA(HANDLE FaxPortHandle, FAX_PORT_INFOA** PortInfo)
#uselib "WINFAX.dll"
#cfunc global FaxGetPortA "FaxGetPortA" intptr, var
; res = FaxGetPortA(FaxPortHandle, PortInfo)
; FaxPortHandle : HANDLE -> "intptr"
; PortInfo : FAX_PORT_INFOA** 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 (
	winfax = windows.NewLazySystemDLL("WINFAX.dll")
	procFaxGetPortA = winfax.NewProc("FaxGetPortA")
)

// FaxPortHandle (HANDLE), PortInfo (FAX_PORT_INFOA** out)
r1, _, err := procFaxGetPortA.Call(
	uintptr(FaxPortHandle),
	uintptr(PortInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function FaxGetPortA(
  FaxPortHandle: THandle;   // HANDLE
  PortInfo: Pointer   // FAX_PORT_INFOA** out
): BOOL; stdcall;
  external 'WINFAX.dll' name 'FaxGetPortA';

result := DllCall("WINFAX\FaxGetPortA"
    , "Ptr", FaxPortHandle   ; HANDLE
    , "Ptr", PortInfo   ; FAX_PORT_INFOA** out
    , "Int")   ; return: BOOL

●FaxGetPortA(FaxPortHandle, PortInfo) = DLL("WINFAX.dll", "bool FaxGetPortA(void*, void*)")
# 呼び出し: FaxGetPortA(FaxPortHandle, PortInfo)
# FaxPortHandle : HANDLE -> "void*"
# PortInfo : FAX_PORT_INFOA** 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)。