SysReAllocStringLen

// OLEAUT32.dll
#include <windows.h>

INT SysReAllocStringLen(
    LPWSTR* pbstr,
    LPCWSTR psz,   // optional
    DWORD len
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function SysReAllocStringLen(
    pbstr As IntPtr,   ' LPWSTR* in/out
    <MarshalAs(UnmanagedType.LPWStr)> psz As String,   ' LPCWSTR optional
    len As UInteger   ' DWORD
) As Integer
End Function

' pbstr : LPWSTR* in/out
' psz : LPCWSTR optional
' len : DWORD
Declare PtrSafe Function SysReAllocStringLen Lib "oleaut32" ( _
    ByVal pbstr As LongPtr, _
    ByVal psz As LongPtr, _
    ByVal len As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SysReAllocStringLen = ctypes.windll.oleaut32.SysReAllocStringLen
SysReAllocStringLen.restype = ctypes.c_int
SysReAllocStringLen.argtypes = [
    ctypes.c_void_p,  # pbstr : LPWSTR* in/out
    wintypes.LPCWSTR,  # psz : LPCWSTR optional
    wintypes.DWORD,  # len : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
SysReAllocStringLen = Fiddle::Function.new(
  lib['SysReAllocStringLen'],
  [
    Fiddle::TYPE_VOIDP,  # pbstr : LPWSTR* in/out
    Fiddle::TYPE_VOIDP,  # psz : LPCWSTR optional
    -Fiddle::TYPE_INT,  # len : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn SysReAllocStringLen(
        pbstr: *mut *mut u16,  // LPWSTR* in/out
        psz: *const u16,  // LPCWSTR optional
        len: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int SysReAllocStringLen(IntPtr pbstr, [MarshalAs(UnmanagedType.LPWStr)] string psz, uint len);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_SysReAllocStringLen' -Namespace Win32 -PassThru
# $api::SysReAllocStringLen(pbstr, psz, len)

#uselib "OLEAUT32.dll"
#func global SysReAllocStringLen "SysReAllocStringLen" sptr, sptr, sptr
; SysReAllocStringLen varptr(pbstr), psz, len   ; 戻り値は stat
; pbstr : LPWSTR* in/out -> "sptr"
; psz : LPCWSTR optional -> "sptr"
; len : DWORD -> "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 "OLEAUT32.dll"
#cfunc global SysReAllocStringLen "SysReAllocStringLen" var, wstr, int
; res = SysReAllocStringLen(pbstr, psz, len)
; pbstr : LPWSTR* in/out -> "var"
; psz : LPCWSTR optional -> "wstr"
; len : DWORD -> "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。

; INT SysReAllocStringLen(LPWSTR* pbstr, LPCWSTR psz, DWORD len)
#uselib "OLEAUT32.dll"
#cfunc global SysReAllocStringLen "SysReAllocStringLen" var, wstr, int
; res = SysReAllocStringLen(pbstr, psz, len)
; pbstr : LPWSTR* in/out -> "var"
; psz : LPCWSTR optional -> "wstr"
; len : DWORD -> "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 (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procSysReAllocStringLen = oleaut32.NewProc("SysReAllocStringLen")
)

// pbstr (LPWSTR* in/out), psz (LPCWSTR optional), len (DWORD)
r1, _, err := procSysReAllocStringLen.Call(
	uintptr(pbstr),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(psz))),
	uintptr(len),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SysReAllocStringLen(
  pbstr: PPWideChar;   // LPWSTR* in/out
  psz: PWideChar;   // LPCWSTR optional
  len: DWORD   // DWORD
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'SysReAllocStringLen';

result := DllCall("OLEAUT32\SysReAllocStringLen"
    , "Ptr", pbstr   ; LPWSTR* in/out
    , "WStr", psz   ; LPCWSTR optional
    , "UInt", len   ; DWORD
    , "Int")   ; return: INT

●SysReAllocStringLen(pbstr, psz, len) = DLL("OLEAUT32.dll", "int SysReAllocStringLen(void*, char*, dword)")
# 呼び出し: SysReAllocStringLen(pbstr, psz, len)
# pbstr : LPWSTR* in/out -> "void*"
# psz : LPCWSTR optional -> "char*"
# len : DWORD -> "dword"
# 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)。