CredUnmarshalCredentialW

// ADVAPI32.dll  (Unicode / -W)
#include <windows.h>

BOOL CredUnmarshalCredentialW(
    LPCWSTR MarshaledCredential,
    CRED_MARSHAL_TYPE* CredType,
    void** Credential
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CredUnmarshalCredentialW(
    <MarshalAs(UnmanagedType.LPWStr)> MarshaledCredential As String,   ' LPCWSTR
    <Out> ByRef CredType As Integer,   ' CRED_MARSHAL_TYPE* out
    Credential As IntPtr   ' void** out
) As Boolean
End Function

' MarshaledCredential : LPCWSTR
' CredType : CRED_MARSHAL_TYPE* out
' Credential : void** out
Declare PtrSafe Function CredUnmarshalCredentialW Lib "advapi32" ( _
    ByVal MarshaledCredential As LongPtr, _
    ByRef CredType As Long, _
    ByVal Credential 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

CredUnmarshalCredentialW = ctypes.windll.advapi32.CredUnmarshalCredentialW
CredUnmarshalCredentialW.restype = wintypes.BOOL
CredUnmarshalCredentialW.argtypes = [
    wintypes.LPCWSTR,  # MarshaledCredential : LPCWSTR
    ctypes.c_void_p,  # CredType : CRED_MARSHAL_TYPE* out
    ctypes.c_void_p,  # Credential : void** out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
CredUnmarshalCredentialW = Fiddle::Function.new(
  lib['CredUnmarshalCredentialW'],
  [
    Fiddle::TYPE_VOIDP,  # MarshaledCredential : LPCWSTR
    Fiddle::TYPE_VOIDP,  # CredType : CRED_MARSHAL_TYPE* out
    Fiddle::TYPE_VOIDP,  # Credential : void** out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advapi32")]
extern "system" {
    fn CredUnmarshalCredentialW(
        MarshaledCredential: *const u16,  // LPCWSTR
        CredType: *mut i32,  // CRED_MARSHAL_TYPE* out
        Credential: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool CredUnmarshalCredentialW([MarshalAs(UnmanagedType.LPWStr)] string MarshaledCredential, out int CredType, IntPtr Credential);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_CredUnmarshalCredentialW' -Namespace Win32 -PassThru
# $api::CredUnmarshalCredentialW(MarshaledCredential, CredType, Credential)

#uselib "ADVAPI32.dll"
#func global CredUnmarshalCredentialW "CredUnmarshalCredentialW" wptr, wptr, wptr
; CredUnmarshalCredentialW MarshaledCredential, CredType, Credential   ; 戻り値は stat
; MarshaledCredential : LPCWSTR -> "wptr"
; CredType : CRED_MARSHAL_TYPE* out -> "wptr"
; Credential : void** 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 "ADVAPI32.dll"
#cfunc global CredUnmarshalCredentialW "CredUnmarshalCredentialW" wstr, int, sptr
; res = CredUnmarshalCredentialW(MarshaledCredential, CredType, Credential)
; MarshaledCredential : LPCWSTR -> "wstr"
; CredType : CRED_MARSHAL_TYPE* out -> "int"
; Credential : void** out -> "sptr"

; BOOL CredUnmarshalCredentialW(LPCWSTR MarshaledCredential, CRED_MARSHAL_TYPE* CredType, void** Credential)
#uselib "ADVAPI32.dll"
#cfunc global CredUnmarshalCredentialW "CredUnmarshalCredentialW" wstr, int, intptr
; res = CredUnmarshalCredentialW(MarshaledCredential, CredType, Credential)
; MarshaledCredential : LPCWSTR -> "wstr"
; CredType : CRED_MARSHAL_TYPE* out -> "int"
; Credential : void** out -> "intptr"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procCredUnmarshalCredentialW = advapi32.NewProc("CredUnmarshalCredentialW")
)

// MarshaledCredential (LPCWSTR), CredType (CRED_MARSHAL_TYPE* out), Credential (void** out)
r1, _, err := procCredUnmarshalCredentialW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(MarshaledCredential))),
	uintptr(CredType),
	uintptr(Credential),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CredUnmarshalCredentialW(
  MarshaledCredential: PWideChar;   // LPCWSTR
  CredType: Pointer;   // CRED_MARSHAL_TYPE* out
  Credential: Pointer   // void** out
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'CredUnmarshalCredentialW';

result := DllCall("ADVAPI32\CredUnmarshalCredentialW"
    , "WStr", MarshaledCredential   ; LPCWSTR
    , "Ptr", CredType   ; CRED_MARSHAL_TYPE* out
    , "Ptr", Credential   ; void** out
    , "Int")   ; return: BOOL

●CredUnmarshalCredentialW(MarshaledCredential, CredType, Credential) = DLL("ADVAPI32.dll", "bool CredUnmarshalCredentialW(char*, void*, void*)")
# 呼び出し: CredUnmarshalCredentialW(MarshaledCredential, CredType, Credential)
# MarshaledCredential : LPCWSTR -> "char*"
# CredType : CRED_MARSHAL_TYPE* out -> "void*"
# Credential : void** 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。