utrans_getUnicodeID

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

WORD* utrans_getUnicodeID(
    const void** trans,
    INT* resultLength
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function utrans_getUnicodeID(
    trans As IntPtr,   ' void**
    ByRef resultLength As Integer   ' INT* in/out
) As IntPtr
End Function

' trans : void**
' resultLength : INT* in/out
Declare PtrSafe Function utrans_getUnicodeID Lib "icuin" ( _
    ByVal trans As LongPtr, _
    ByRef resultLength As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

utrans_getUnicodeID = ctypes.cdll.icuin.utrans_getUnicodeID
utrans_getUnicodeID.restype = ctypes.c_void_p
utrans_getUnicodeID.argtypes = [
    ctypes.c_void_p,  # trans : void**
    ctypes.POINTER(ctypes.c_int),  # resultLength : INT* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
utrans_getUnicodeID = Fiddle::Function.new(
  lib['utrans_getUnicodeID'],
  [
    Fiddle::TYPE_VOIDP,  # trans : void**
    Fiddle::TYPE_VOIDP,  # resultLength : INT* in/out
  ],
  Fiddle::TYPE_VOIDP, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn utrans_getUnicodeID(
        trans: *const *const (),  // void**
        resultLength: *mut i32  // INT* in/out
    ) -> *mut u16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern IntPtr utrans_getUnicodeID(IntPtr trans, ref int resultLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_utrans_getUnicodeID' -Namespace Win32 -PassThru
# $api::utrans_getUnicodeID(trans, resultLength)

#uselib "icuin.dll"
#func global utrans_getUnicodeID "utrans_getUnicodeID" sptr, sptr
; utrans_getUnicodeID trans, varptr(resultLength)   ; 戻り値は stat
; trans : void** -> "sptr"
; resultLength : INT* in/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 "icuin.dll"
#cfunc global utrans_getUnicodeID "utrans_getUnicodeID" sptr, var
; res = utrans_getUnicodeID(trans, resultLength)
; trans : void** -> "sptr"
; resultLength : INT* 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。

; WORD* utrans_getUnicodeID(void** trans, INT* resultLength)
#uselib "icuin.dll"
#cfunc global utrans_getUnicodeID "utrans_getUnicodeID" intptr, var
; res = utrans_getUnicodeID(trans, resultLength)
; trans : void** -> "intptr"
; resultLength : INT* 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 (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procutrans_getUnicodeID = icuin.NewProc("utrans_getUnicodeID")
)

// trans (void**), resultLength (INT* in/out)
r1, _, err := procutrans_getUnicodeID.Call(
	uintptr(trans),
	uintptr(resultLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WORD*

function utrans_getUnicodeID(
  trans: Pointer;   // void**
  resultLength: Pointer   // INT* in/out
): Pointer; cdecl;
  external 'icuin.dll' name 'utrans_getUnicodeID';

result := DllCall("icuin\utrans_getUnicodeID"
    , "Ptr", trans   ; void**
    , "Ptr", resultLength   ; INT* in/out
    , "Cdecl Ptr")   ; return: WORD*

●utrans_getUnicodeID(trans, resultLength) = DLL("icuin.dll", "void* utrans_getUnicodeID(void*, void*)")
# 呼び出し: utrans_getUnicodeID(trans, resultLength)
# trans : void** -> "void*"
# resultLength : INT* 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)。
# ※cdecl関数。DLL()宣言はstdcall前提。cdeclは EXEC_PTR(`cdecl`,…) を使用。