wvnsprintfW

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

INT wvnsprintfW(
    LPWSTR pszDest,
    INT cchDest,
    LPCWSTR pszFmt,
    CHAR* arglist
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function wvnsprintfW(
    <MarshalAs(UnmanagedType.LPWStr)> pszDest As System.Text.StringBuilder,   ' LPWSTR out
    cchDest As Integer,   ' INT
    <MarshalAs(UnmanagedType.LPWStr)> pszFmt As String,   ' LPCWSTR
    arglist As IntPtr   ' CHAR*
) As Integer
End Function

' pszDest : LPWSTR out
' cchDest : INT
' pszFmt : LPCWSTR
' arglist : CHAR*
Declare PtrSafe Function wvnsprintfW Lib "shlwapi" ( _
    ByVal pszDest As LongPtr, _
    ByVal cchDest As Long, _
    ByVal pszFmt As LongPtr, _
    ByVal arglist 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

wvnsprintfW = ctypes.windll.shlwapi.wvnsprintfW
wvnsprintfW.restype = ctypes.c_int
wvnsprintfW.argtypes = [
    wintypes.LPWSTR,  # pszDest : LPWSTR out
    ctypes.c_int,  # cchDest : INT
    wintypes.LPCWSTR,  # pszFmt : LPCWSTR
    ctypes.POINTER(ctypes.c_byte),  # arglist : CHAR*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
wvnsprintfW = Fiddle::Function.new(
  lib['wvnsprintfW'],
  [
    Fiddle::TYPE_VOIDP,  # pszDest : LPWSTR out
    Fiddle::TYPE_INT,  # cchDest : INT
    Fiddle::TYPE_VOIDP,  # pszFmt : LPCWSTR
    Fiddle::TYPE_VOIDP,  # arglist : CHAR*
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shlwapi")]
extern "system" {
    fn wvnsprintfW(
        pszDest: *mut u16,  // LPWSTR out
        cchDest: i32,  // INT
        pszFmt: *const u16,  // LPCWSTR
        arglist: *mut i8  // CHAR*
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll", CharSet = CharSet.Unicode)]
public static extern int wvnsprintfW([MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszDest, int cchDest, [MarshalAs(UnmanagedType.LPWStr)] string pszFmt, IntPtr arglist);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_wvnsprintfW' -Namespace Win32 -PassThru
# $api::wvnsprintfW(pszDest, cchDest, pszFmt, arglist)

#uselib "SHLWAPI.dll"
#func global wvnsprintfW "wvnsprintfW" wptr, wptr, wptr, wptr
; wvnsprintfW varptr(pszDest), cchDest, pszFmt, varptr(arglist)   ; 戻り値は stat
; pszDest : LPWSTR out -> "wptr"
; cchDest : INT -> "wptr"
; pszFmt : LPCWSTR -> "wptr"
; arglist : CHAR* -> "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 "SHLWAPI.dll"
#cfunc global wvnsprintfW "wvnsprintfW" var, int, wstr, var
; res = wvnsprintfW(pszDest, cchDest, pszFmt, arglist)
; pszDest : LPWSTR out -> "var"
; cchDest : INT -> "int"
; pszFmt : LPCWSTR -> "wstr"
; arglist : CHAR* -> "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。

; INT wvnsprintfW(LPWSTR pszDest, INT cchDest, LPCWSTR pszFmt, CHAR* arglist)
#uselib "SHLWAPI.dll"
#cfunc global wvnsprintfW "wvnsprintfW" var, int, wstr, var
; res = wvnsprintfW(pszDest, cchDest, pszFmt, arglist)
; pszDest : LPWSTR out -> "var"
; cchDest : INT -> "int"
; pszFmt : LPCWSTR -> "wstr"
; arglist : CHAR* -> "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 (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procwvnsprintfW = shlwapi.NewProc("wvnsprintfW")
)

// pszDest (LPWSTR out), cchDest (INT), pszFmt (LPCWSTR), arglist (CHAR*)
r1, _, err := procwvnsprintfW.Call(
	uintptr(pszDest),
	uintptr(cchDest),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszFmt))),
	uintptr(arglist),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function wvnsprintfW(
  pszDest: PWideChar;   // LPWSTR out
  cchDest: Integer;   // INT
  pszFmt: PWideChar;   // LPCWSTR
  arglist: Pointer   // CHAR*
): Integer; stdcall;
  external 'SHLWAPI.dll' name 'wvnsprintfW';

result := DllCall("SHLWAPI\wvnsprintfW"
    , "Ptr", pszDest   ; LPWSTR out
    , "Int", cchDest   ; INT
    , "WStr", pszFmt   ; LPCWSTR
    , "Ptr", arglist   ; CHAR*
    , "Int")   ; return: INT

●wvnsprintfW(pszDest, cchDest, pszFmt, arglist) = DLL("SHLWAPI.dll", "int wvnsprintfW(char*, int, char*, void*)")
# 呼び出し: wvnsprintfW(pszDest, cchDest, pszFmt, arglist)
# pszDest : LPWSTR out -> "char*"
# cchDest : INT -> "int"
# pszFmt : LPCWSTR -> "char*"
# arglist : CHAR* -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。