VarBstrFromI2

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

HRESULT VarBstrFromI2(
    SHORT iVal,
    DWORD lcid,
    DWORD dwFlags,
    LPWSTR* pbstrOut
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarBstrFromI2(
    iVal As Short,   ' SHORT
    lcid As UInteger,   ' DWORD
    dwFlags As UInteger,   ' DWORD
    pbstrOut As IntPtr   ' LPWSTR* out
) As Integer
End Function

' iVal : SHORT
' lcid : DWORD
' dwFlags : DWORD
' pbstrOut : LPWSTR* out
Declare PtrSafe Function VarBstrFromI2 Lib "oleaut32" ( _
    ByVal iVal As Integer, _
    ByVal lcid As Long, _
    ByVal dwFlags As Long, _
    ByVal pbstrOut As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

VarBstrFromI2 = ctypes.windll.oleaut32.VarBstrFromI2
VarBstrFromI2.restype = ctypes.c_int
VarBstrFromI2.argtypes = [
    ctypes.c_short,  # iVal : SHORT
    wintypes.DWORD,  # lcid : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
    ctypes.c_void_p,  # pbstrOut : LPWSTR* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarBstrFromI2 = Fiddle::Function.new(
  lib['VarBstrFromI2'],
  [
    Fiddle::TYPE_SHORT,  # iVal : SHORT
    -Fiddle::TYPE_INT,  # lcid : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # pbstrOut : LPWSTR* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarBstrFromI2(
        iVal: i16,  // SHORT
        lcid: u32,  // DWORD
        dwFlags: u32,  // DWORD
        pbstrOut: *mut *mut u16  // LPWSTR* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarBstrFromI2(short iVal, uint lcid, uint dwFlags, IntPtr pbstrOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarBstrFromI2' -Namespace Win32 -PassThru
# $api::VarBstrFromI2(iVal, lcid, dwFlags, pbstrOut)

#uselib "OLEAUT32.dll"
#func global VarBstrFromI2 "VarBstrFromI2" sptr, sptr, sptr, sptr
; VarBstrFromI2 iVal, lcid, dwFlags, varptr(pbstrOut)   ; 戻り値は stat
; iVal : SHORT -> "sptr"
; lcid : DWORD -> "sptr"
; dwFlags : DWORD -> "sptr"
; pbstrOut : LPWSTR* 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 "OLEAUT32.dll"
#cfunc global VarBstrFromI2 "VarBstrFromI2" int, int, int, var
; res = VarBstrFromI2(iVal, lcid, dwFlags, pbstrOut)
; iVal : SHORT -> "int"
; lcid : DWORD -> "int"
; dwFlags : DWORD -> "int"
; pbstrOut : LPWSTR* 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。

; HRESULT VarBstrFromI2(SHORT iVal, DWORD lcid, DWORD dwFlags, LPWSTR* pbstrOut)
#uselib "OLEAUT32.dll"
#cfunc global VarBstrFromI2 "VarBstrFromI2" int, int, int, var
; res = VarBstrFromI2(iVal, lcid, dwFlags, pbstrOut)
; iVal : SHORT -> "int"
; lcid : DWORD -> "int"
; dwFlags : DWORD -> "int"
; pbstrOut : LPWSTR* 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 (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procVarBstrFromI2 = oleaut32.NewProc("VarBstrFromI2")
)

// iVal (SHORT), lcid (DWORD), dwFlags (DWORD), pbstrOut (LPWSTR* out)
r1, _, err := procVarBstrFromI2.Call(
	uintptr(iVal),
	uintptr(lcid),
	uintptr(dwFlags),
	uintptr(pbstrOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarBstrFromI2(
  iVal: Smallint;   // SHORT
  lcid: DWORD;   // DWORD
  dwFlags: DWORD;   // DWORD
  pbstrOut: PPWideChar   // LPWSTR* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarBstrFromI2';

result := DllCall("OLEAUT32\VarBstrFromI2"
    , "Short", iVal   ; SHORT
    , "UInt", lcid   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "Ptr", pbstrOut   ; LPWSTR* out
    , "Int")   ; return: HRESULT

●VarBstrFromI2(iVal, lcid, dwFlags, pbstrOut) = DLL("OLEAUT32.dll", "int VarBstrFromI2(int, dword, dword, void*)")
# 呼び出し: VarBstrFromI2(iVal, lcid, dwFlags, pbstrOut)
# iVal : SHORT -> "int"
# lcid : DWORD -> "dword"
# dwFlags : DWORD -> "dword"
# pbstrOut : LPWSTR* 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)。