GetAllUsersProfileDirectoryW

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

BOOL GetAllUsersProfileDirectoryW(
    LPWSTR lpProfileDir,   // optional
    DWORD* lpcchSize
);

<DllImport("USERENV.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetAllUsersProfileDirectoryW(
    <MarshalAs(UnmanagedType.LPWStr)> lpProfileDir As System.Text.StringBuilder,   ' LPWSTR optional, out
    ByRef lpcchSize As UInteger   ' DWORD* in/out
) As Boolean
End Function

' lpProfileDir : LPWSTR optional, out
' lpcchSize : DWORD* in/out
Declare PtrSafe Function GetAllUsersProfileDirectoryW Lib "userenv" ( _
    ByVal lpProfileDir As LongPtr, _
    ByRef lpcchSize As Long) 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

GetAllUsersProfileDirectoryW = ctypes.windll.userenv.GetAllUsersProfileDirectoryW
GetAllUsersProfileDirectoryW.restype = wintypes.BOOL
GetAllUsersProfileDirectoryW.argtypes = [
    wintypes.LPWSTR,  # lpProfileDir : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpcchSize : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USERENV.dll')
GetAllUsersProfileDirectoryW = Fiddle::Function.new(
  lib['GetAllUsersProfileDirectoryW'],
  [
    Fiddle::TYPE_VOIDP,  # lpProfileDir : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # lpcchSize : DWORD* in/out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "userenv")]
extern "system" {
    fn GetAllUsersProfileDirectoryW(
        lpProfileDir: *mut u16,  // LPWSTR optional, out
        lpcchSize: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USERENV.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool GetAllUsersProfileDirectoryW([MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpProfileDir, ref uint lpcchSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USERENV_GetAllUsersProfileDirectoryW' -Namespace Win32 -PassThru
# $api::GetAllUsersProfileDirectoryW(lpProfileDir, lpcchSize)

#uselib "USERENV.dll"
#func global GetAllUsersProfileDirectoryW "GetAllUsersProfileDirectoryW" wptr, wptr
; GetAllUsersProfileDirectoryW varptr(lpProfileDir), varptr(lpcchSize)   ; 戻り値は stat
; lpProfileDir : LPWSTR optional, out -> "wptr"
; lpcchSize : DWORD* in/out -> "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 "USERENV.dll"
#cfunc global GetAllUsersProfileDirectoryW "GetAllUsersProfileDirectoryW" var, var
; res = GetAllUsersProfileDirectoryW(lpProfileDir, lpcchSize)
; lpProfileDir : LPWSTR optional, out -> "var"
; lpcchSize : DWORD* 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。

; BOOL GetAllUsersProfileDirectoryW(LPWSTR lpProfileDir, DWORD* lpcchSize)
#uselib "USERENV.dll"
#cfunc global GetAllUsersProfileDirectoryW "GetAllUsersProfileDirectoryW" var, var
; res = GetAllUsersProfileDirectoryW(lpProfileDir, lpcchSize)
; lpProfileDir : LPWSTR optional, out -> "var"
; lpcchSize : DWORD* 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 (
	userenv = windows.NewLazySystemDLL("USERENV.dll")
	procGetAllUsersProfileDirectoryW = userenv.NewProc("GetAllUsersProfileDirectoryW")
)

// lpProfileDir (LPWSTR optional, out), lpcchSize (DWORD* in/out)
r1, _, err := procGetAllUsersProfileDirectoryW.Call(
	uintptr(lpProfileDir),
	uintptr(lpcchSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetAllUsersProfileDirectoryW(
  lpProfileDir: PWideChar;   // LPWSTR optional, out
  lpcchSize: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'USERENV.dll' name 'GetAllUsersProfileDirectoryW';

result := DllCall("USERENV\GetAllUsersProfileDirectoryW"
    , "Ptr", lpProfileDir   ; LPWSTR optional, out
    , "Ptr", lpcchSize   ; DWORD* in/out
    , "Int")   ; return: BOOL

●GetAllUsersProfileDirectoryW(lpProfileDir, lpcchSize) = DLL("USERENV.dll", "bool GetAllUsersProfileDirectoryW(char*, void*)")
# 呼び出し: GetAllUsersProfileDirectoryW(lpProfileDir, lpcchSize)
# lpProfileDir : LPWSTR optional, out -> "char*"
# lpcchSize : DWORD* 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。