ufmtval_getString

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

WORD* ufmtval_getString(
    const UFormattedValue* ufmtval,
    INT* pLength,
    UErrorCode* ec
);

<DllImport("icu.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function ufmtval_getString(
    ByRef ufmtval As IntPtr,   ' UFormattedValue*
    ByRef pLength As Integer,   ' INT* in/out
    ByRef ec As Integer   ' UErrorCode* in/out
) As IntPtr
End Function

' ufmtval : UFormattedValue*
' pLength : INT* in/out
' ec : UErrorCode* in/out
Declare PtrSafe Function ufmtval_getString Lib "icu" ( _
    ByRef ufmtval As LongPtr, _
    ByRef pLength As Long, _
    ByRef ec 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

ufmtval_getString = ctypes.cdll.icu.ufmtval_getString
ufmtval_getString.restype = ctypes.c_void_p
ufmtval_getString.argtypes = [
    ctypes.c_void_p,  # ufmtval : UFormattedValue*
    ctypes.POINTER(ctypes.c_int),  # pLength : INT* in/out
    ctypes.c_void_p,  # ec : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icu.dll')
ufmtval_getString = Fiddle::Function.new(
  lib['ufmtval_getString'],
  [
    Fiddle::TYPE_VOIDP,  # ufmtval : UFormattedValue*
    Fiddle::TYPE_VOIDP,  # pLength : INT* in/out
    Fiddle::TYPE_VOIDP,  # ec : UErrorCode* in/out
  ],
  Fiddle::TYPE_VOIDP, Fiddle::Function::CDECL)

#[link(name = "icu")]
extern "C" {
    fn ufmtval_getString(
        ufmtval: *const isize,  // UFormattedValue*
        pLength: *mut i32,  // INT* in/out
        ec: *mut i32  // UErrorCode* in/out
    ) -> *mut u16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icu.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern IntPtr ufmtval_getString(ref IntPtr ufmtval, ref int pLength, ref int ec);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icu_ufmtval_getString' -Namespace Win32 -PassThru
# $api::ufmtval_getString(ufmtval, pLength, ec)

#uselib "icu.dll"
#func global ufmtval_getString "ufmtval_getString" sptr, sptr, sptr
; ufmtval_getString ufmtval, varptr(pLength), ec   ; 戻り値は stat
; ufmtval : UFormattedValue* -> "sptr"
; pLength : INT* in/out -> "sptr"
; ec : UErrorCode* 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 "icu.dll"
#cfunc global ufmtval_getString "ufmtval_getString" int, var, int
; res = ufmtval_getString(ufmtval, pLength, ec)
; ufmtval : UFormattedValue* -> "int"
; pLength : INT* in/out -> "var"
; ec : UErrorCode* in/out -> "int"
; ※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* ufmtval_getString(UFormattedValue* ufmtval, INT* pLength, UErrorCode* ec)
#uselib "icu.dll"
#cfunc global ufmtval_getString "ufmtval_getString" int, var, int
; res = ufmtval_getString(ufmtval, pLength, ec)
; ufmtval : UFormattedValue* -> "int"
; pLength : INT* in/out -> "var"
; ec : UErrorCode* in/out -> "int"
; ※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 (
	icu = windows.NewLazySystemDLL("icu.dll")
	procufmtval_getString = icu.NewProc("ufmtval_getString")
)

// ufmtval (UFormattedValue*), pLength (INT* in/out), ec (UErrorCode* in/out)
r1, _, err := procufmtval_getString.Call(
	uintptr(ufmtval),
	uintptr(pLength),
	uintptr(ec),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WORD*

function ufmtval_getString(
  ufmtval: Pointer;   // UFormattedValue*
  pLength: Pointer;   // INT* in/out
  ec: Pointer   // UErrorCode* in/out
): Pointer; cdecl;
  external 'icu.dll' name 'ufmtval_getString';

result := DllCall("icu\ufmtval_getString"
    , "Ptr", ufmtval   ; UFormattedValue*
    , "Ptr", pLength   ; INT* in/out
    , "Ptr", ec   ; UErrorCode* in/out
    , "Cdecl Ptr")   ; return: WORD*

●ufmtval_getString(ufmtval, pLength, ec) = DLL("icu.dll", "void* ufmtval_getString(void*, void*, void*)")
# 呼び出し: ufmtval_getString(ufmtval, pLength, ec)
# ufmtval : UFormattedValue* -> "void*"
# pLength : INT* in/out -> "void*"
# ec : UErrorCode* 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。