lineGetDevConfigW

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

INT lineGetDevConfigW(
    DWORD dwDeviceID,
    VARSTRING* lpDeviceConfig,
    LPCWSTR lpszDeviceClass
);

<DllImport("TAPI32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function lineGetDevConfigW(
    dwDeviceID As UInteger,   ' DWORD
    lpDeviceConfig As IntPtr,   ' VARSTRING* in/out
    <MarshalAs(UnmanagedType.LPWStr)> lpszDeviceClass As String   ' LPCWSTR
) As Integer
End Function

' dwDeviceID : DWORD
' lpDeviceConfig : VARSTRING* in/out
' lpszDeviceClass : LPCWSTR
Declare PtrSafe Function lineGetDevConfigW Lib "tapi32" ( _
    ByVal dwDeviceID As Long, _
    ByVal lpDeviceConfig As LongPtr, _
    ByVal lpszDeviceClass 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

lineGetDevConfigW = ctypes.windll.tapi32.lineGetDevConfigW
lineGetDevConfigW.restype = ctypes.c_int
lineGetDevConfigW.argtypes = [
    wintypes.DWORD,  # dwDeviceID : DWORD
    ctypes.c_void_p,  # lpDeviceConfig : VARSTRING* in/out
    wintypes.LPCWSTR,  # lpszDeviceClass : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('TAPI32.dll')
lineGetDevConfigW = Fiddle::Function.new(
  lib['lineGetDevConfigW'],
  [
    -Fiddle::TYPE_INT,  # dwDeviceID : DWORD
    Fiddle::TYPE_VOIDP,  # lpDeviceConfig : VARSTRING* in/out
    Fiddle::TYPE_VOIDP,  # lpszDeviceClass : LPCWSTR
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "tapi32")]
extern "system" {
    fn lineGetDevConfigW(
        dwDeviceID: u32,  // DWORD
        lpDeviceConfig: *mut VARSTRING,  // VARSTRING* in/out
        lpszDeviceClass: *const u16  // LPCWSTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("TAPI32.dll", CharSet = CharSet.Unicode)]
public static extern int lineGetDevConfigW(uint dwDeviceID, IntPtr lpDeviceConfig, [MarshalAs(UnmanagedType.LPWStr)] string lpszDeviceClass);
"@
$api = Add-Type -MemberDefinition $sig -Name 'TAPI32_lineGetDevConfigW' -Namespace Win32 -PassThru
# $api::lineGetDevConfigW(dwDeviceID, lpDeviceConfig, lpszDeviceClass)

#uselib "TAPI32.dll"
#func global lineGetDevConfigW "lineGetDevConfigW" wptr, wptr, wptr
; lineGetDevConfigW dwDeviceID, varptr(lpDeviceConfig), lpszDeviceClass   ; 戻り値は stat
; dwDeviceID : DWORD -> "wptr"
; lpDeviceConfig : VARSTRING* in/out -> "wptr"
; lpszDeviceClass : LPCWSTR -> "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 lineGetDevConfigW "lineGetDevConfigW" int, var, wstr
; res = lineGetDevConfigW(dwDeviceID, lpDeviceConfig, lpszDeviceClass)
; dwDeviceID : DWORD -> "int"
; lpDeviceConfig : VARSTRING* in/out -> "var"
; lpszDeviceClass : LPCWSTR -> "wstr"
; ※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 lineGetDevConfigW(DWORD dwDeviceID, VARSTRING* lpDeviceConfig, LPCWSTR lpszDeviceClass)
#uselib "TAPI32.dll"
#cfunc global lineGetDevConfigW "lineGetDevConfigW" int, var, wstr
; res = lineGetDevConfigW(dwDeviceID, lpDeviceConfig, lpszDeviceClass)
; dwDeviceID : DWORD -> "int"
; lpDeviceConfig : VARSTRING* in/out -> "var"
; lpszDeviceClass : LPCWSTR -> "wstr"
; ※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")
	proclineGetDevConfigW = tapi32.NewProc("lineGetDevConfigW")
)

// dwDeviceID (DWORD), lpDeviceConfig (VARSTRING* in/out), lpszDeviceClass (LPCWSTR)
r1, _, err := proclineGetDevConfigW.Call(
	uintptr(dwDeviceID),
	uintptr(lpDeviceConfig),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszDeviceClass))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function lineGetDevConfigW(
  dwDeviceID: DWORD;   // DWORD
  lpDeviceConfig: Pointer;   // VARSTRING* in/out
  lpszDeviceClass: PWideChar   // LPCWSTR
): Integer; stdcall;
  external 'TAPI32.dll' name 'lineGetDevConfigW';

result := DllCall("TAPI32\lineGetDevConfigW"
    , "UInt", dwDeviceID   ; DWORD
    , "Ptr", lpDeviceConfig   ; VARSTRING* in/out
    , "WStr", lpszDeviceClass   ; LPCWSTR
    , "Int")   ; return: INT

●lineGetDevConfigW(dwDeviceID, lpDeviceConfig, lpszDeviceClass) = DLL("TAPI32.dll", "int lineGetDevConfigW(dword, void*, char*)")
# 呼び出し: lineGetDevConfigW(dwDeviceID, lpDeviceConfig, lpszDeviceClass)
# dwDeviceID : DWORD -> "dword"
# lpDeviceConfig : VARSTRING* in/out -> "void*"
# lpszDeviceClass : LPCWSTR -> "char*"
# 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。