ADsDecodeBinaryData

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

HRESULT ADsDecodeBinaryData(
    LPCWSTR szSrcData,
    BYTE** ppbDestData,
    DWORD* pdwDestLen
);

<DllImport("ACTIVEDS.dll", ExactSpelling:=True)>
Public Shared Function ADsDecodeBinaryData(
    <MarshalAs(UnmanagedType.LPWStr)> szSrcData As String,   ' LPCWSTR
    ppbDestData As IntPtr,   ' BYTE** in/out
    ByRef pdwDestLen As UInteger   ' DWORD* in/out
) As Integer
End Function

' szSrcData : LPCWSTR
' ppbDestData : BYTE** in/out
' pdwDestLen : DWORD* in/out
Declare PtrSafe Function ADsDecodeBinaryData Lib "activeds" ( _
    ByVal szSrcData As LongPtr, _
    ByVal ppbDestData As LongPtr, _
    ByRef pdwDestLen 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

ADsDecodeBinaryData = ctypes.windll.activeds.ADsDecodeBinaryData
ADsDecodeBinaryData.restype = ctypes.c_int
ADsDecodeBinaryData.argtypes = [
    wintypes.LPCWSTR,  # szSrcData : LPCWSTR
    ctypes.c_void_p,  # ppbDestData : BYTE** in/out
    ctypes.POINTER(wintypes.DWORD),  # pdwDestLen : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ACTIVEDS.dll')
ADsDecodeBinaryData = Fiddle::Function.new(
  lib['ADsDecodeBinaryData'],
  [
    Fiddle::TYPE_VOIDP,  # szSrcData : LPCWSTR
    Fiddle::TYPE_VOIDP,  # ppbDestData : BYTE** in/out
    Fiddle::TYPE_VOIDP,  # pdwDestLen : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "activeds")]
extern "system" {
    fn ADsDecodeBinaryData(
        szSrcData: *const u16,  // LPCWSTR
        ppbDestData: *mut *mut u8,  // BYTE** in/out
        pdwDestLen: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ACTIVEDS.dll")]
public static extern int ADsDecodeBinaryData([MarshalAs(UnmanagedType.LPWStr)] string szSrcData, IntPtr ppbDestData, ref uint pdwDestLen);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ACTIVEDS_ADsDecodeBinaryData' -Namespace Win32 -PassThru
# $api::ADsDecodeBinaryData(szSrcData, ppbDestData, pdwDestLen)

#uselib "ACTIVEDS.dll"
#func global ADsDecodeBinaryData "ADsDecodeBinaryData" sptr, sptr, sptr
; ADsDecodeBinaryData szSrcData, varptr(ppbDestData), varptr(pdwDestLen)   ; 戻り値は stat
; szSrcData : LPCWSTR -> "sptr"
; ppbDestData : BYTE** in/out -> "sptr"
; pdwDestLen : DWORD* 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 "ACTIVEDS.dll"
#cfunc global ADsDecodeBinaryData "ADsDecodeBinaryData" wstr, var, var
; res = ADsDecodeBinaryData(szSrcData, ppbDestData, pdwDestLen)
; szSrcData : LPCWSTR -> "wstr"
; ppbDestData : BYTE** in/out -> "var"
; pdwDestLen : 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。

; HRESULT ADsDecodeBinaryData(LPCWSTR szSrcData, BYTE** ppbDestData, DWORD* pdwDestLen)
#uselib "ACTIVEDS.dll"
#cfunc global ADsDecodeBinaryData "ADsDecodeBinaryData" wstr, var, var
; res = ADsDecodeBinaryData(szSrcData, ppbDestData, pdwDestLen)
; szSrcData : LPCWSTR -> "wstr"
; ppbDestData : BYTE** in/out -> "var"
; pdwDestLen : 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 (
	activeds = windows.NewLazySystemDLL("ACTIVEDS.dll")
	procADsDecodeBinaryData = activeds.NewProc("ADsDecodeBinaryData")
)

// szSrcData (LPCWSTR), ppbDestData (BYTE** in/out), pdwDestLen (DWORD* in/out)
r1, _, err := procADsDecodeBinaryData.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szSrcData))),
	uintptr(ppbDestData),
	uintptr(pdwDestLen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function ADsDecodeBinaryData(
  szSrcData: PWideChar;   // LPCWSTR
  ppbDestData: Pointer;   // BYTE** in/out
  pdwDestLen: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'ACTIVEDS.dll' name 'ADsDecodeBinaryData';

result := DllCall("ACTIVEDS\ADsDecodeBinaryData"
    , "WStr", szSrcData   ; LPCWSTR
    , "Ptr", ppbDestData   ; BYTE** in/out
    , "Ptr", pdwDestLen   ; DWORD* in/out
    , "Int")   ; return: HRESULT

●ADsDecodeBinaryData(szSrcData, ppbDestData, pdwDestLen) = DLL("ACTIVEDS.dll", "int ADsDecodeBinaryData(char*, void*, void*)")
# 呼び出し: ADsDecodeBinaryData(szSrcData, ppbDestData, pdwDestLen)
# szSrcData : LPCWSTR -> "char*"
# ppbDestData : BYTE** in/out -> "void*"
# pdwDestLen : 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)。