lineGetQueueListW

// TAPI32.dll  (Unicode / -W)
#include <windows.h>

INT lineGetQueueListW(
    DWORD hLine,
    GUID* lpGroupID,
    LINEQUEUELIST* lpQueueList
);

<DllImport("TAPI32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function lineGetQueueListW(
    hLine As UInteger,   ' DWORD
    ByRef lpGroupID As Guid,   ' GUID* in/out
    lpQueueList As IntPtr   ' LINEQUEUELIST* in/out
) As Integer
End Function

' hLine : DWORD
' lpGroupID : GUID* in/out
' lpQueueList : LINEQUEUELIST* in/out
Declare PtrSafe Function lineGetQueueListW Lib "tapi32" ( _
    ByVal hLine As Long, _
    ByVal lpGroupID As LongPtr, _
    ByVal lpQueueList As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

lineGetQueueListW = ctypes.windll.tapi32.lineGetQueueListW
lineGetQueueListW.restype = ctypes.c_int
lineGetQueueListW.argtypes = [
    wintypes.DWORD,  # hLine : DWORD
    ctypes.c_void_p,  # lpGroupID : GUID* in/out
    ctypes.c_void_p,  # lpQueueList : LINEQUEUELIST* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('TAPI32.dll')
lineGetQueueListW = Fiddle::Function.new(
  lib['lineGetQueueListW'],
  [
    -Fiddle::TYPE_INT,  # hLine : DWORD
    Fiddle::TYPE_VOIDP,  # lpGroupID : GUID* in/out
    Fiddle::TYPE_VOIDP,  # lpQueueList : LINEQUEUELIST* in/out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "tapi32")]
extern "system" {
    fn lineGetQueueListW(
        hLine: u32,  // DWORD
        lpGroupID: *mut GUID,  // GUID* in/out
        lpQueueList: *mut LINEQUEUELIST  // LINEQUEUELIST* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("TAPI32.dll", CharSet = CharSet.Unicode)]
public static extern int lineGetQueueListW(uint hLine, ref Guid lpGroupID, IntPtr lpQueueList);
"@
$api = Add-Type -MemberDefinition $sig -Name 'TAPI32_lineGetQueueListW' -Namespace Win32 -PassThru
# $api::lineGetQueueListW(hLine, lpGroupID, lpQueueList)

#uselib "TAPI32.dll"
#func global lineGetQueueListW "lineGetQueueListW" wptr, wptr, wptr
; lineGetQueueListW hLine, varptr(lpGroupID), varptr(lpQueueList)   ; 戻り値は stat
; hLine : DWORD -> "wptr"
; lpGroupID : GUID* in/out -> "wptr"
; lpQueueList : LINEQUEUELIST* in/out -> "wptr"
; ※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 "TAPI32.dll"
#cfunc global lineGetQueueListW "lineGetQueueListW" int, var, var
; res = lineGetQueueListW(hLine, lpGroupID, lpQueueList)
; hLine : DWORD -> "int"
; lpGroupID : GUID* in/out -> "var"
; lpQueueList : LINEQUEUELIST* in/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。

; INT lineGetQueueListW(DWORD hLine, GUID* lpGroupID, LINEQUEUELIST* lpQueueList)
#uselib "TAPI32.dll"
#cfunc global lineGetQueueListW "lineGetQueueListW" int, var, var
; res = lineGetQueueListW(hLine, lpGroupID, lpQueueList)
; hLine : DWORD -> "int"
; lpGroupID : GUID* in/out -> "var"
; lpQueueList : LINEQUEUELIST* in/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 (
	tapi32 = windows.NewLazySystemDLL("TAPI32.dll")
	proclineGetQueueListW = tapi32.NewProc("lineGetQueueListW")
)

// hLine (DWORD), lpGroupID (GUID* in/out), lpQueueList (LINEQUEUELIST* in/out)
r1, _, err := proclineGetQueueListW.Call(
	uintptr(hLine),
	uintptr(lpGroupID),
	uintptr(lpQueueList),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function lineGetQueueListW(
  hLine: DWORD;   // DWORD
  lpGroupID: PGUID;   // GUID* in/out
  lpQueueList: Pointer   // LINEQUEUELIST* in/out
): Integer; stdcall;
  external 'TAPI32.dll' name 'lineGetQueueListW';

result := DllCall("TAPI32\lineGetQueueListW"
    , "UInt", hLine   ; DWORD
    , "Ptr", lpGroupID   ; GUID* in/out
    , "Ptr", lpQueueList   ; LINEQUEUELIST* in/out
    , "Int")   ; return: INT

●lineGetQueueListW(hLine, lpGroupID, lpQueueList) = DLL("TAPI32.dll", "int lineGetQueueListW(dword, void*, void*)")
# 呼び出し: lineGetQueueListW(hLine, lpGroupID, lpQueueList)
# hLine : DWORD -> "dword"
# lpGroupID : GUID* in/out -> "void*"
# lpQueueList : LINEQUEUELIST* in/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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。