CredPackAuthenticationBufferA

// credui.dll  (ANSI / -A)
#include <windows.h>

BOOL CredPackAuthenticationBufferA(
    CRED_PACK_FLAGS dwFlags,
    LPSTR pszUserName,
    LPSTR pszPassword,
    BYTE* pPackedCredentials,   // optional
    DWORD* pcbPackedCredentials
);

<DllImport("credui.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CredPackAuthenticationBufferA(
    dwFlags As UInteger,   ' CRED_PACK_FLAGS
    <MarshalAs(UnmanagedType.LPStr)> pszUserName As String,   ' LPSTR
    <MarshalAs(UnmanagedType.LPStr)> pszPassword As String,   ' LPSTR
    pPackedCredentials As IntPtr,   ' BYTE* optional, out
    ByRef pcbPackedCredentials As UInteger   ' DWORD* in/out
) As Boolean
End Function

' dwFlags : CRED_PACK_FLAGS
' pszUserName : LPSTR
' pszPassword : LPSTR
' pPackedCredentials : BYTE* optional, out
' pcbPackedCredentials : DWORD* in/out
Declare PtrSafe Function CredPackAuthenticationBufferA Lib "credui" ( _
    ByVal dwFlags As Long, _
    ByVal pszUserName As String, _
    ByVal pszPassword As String, _
    ByVal pPackedCredentials As LongPtr, _
    ByRef pcbPackedCredentials 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

CredPackAuthenticationBufferA = ctypes.windll.credui.CredPackAuthenticationBufferA
CredPackAuthenticationBufferA.restype = wintypes.BOOL
CredPackAuthenticationBufferA.argtypes = [
    wintypes.DWORD,  # dwFlags : CRED_PACK_FLAGS
    wintypes.LPCSTR,  # pszUserName : LPSTR
    wintypes.LPCSTR,  # pszPassword : LPSTR
    ctypes.POINTER(ctypes.c_ubyte),  # pPackedCredentials : BYTE* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcbPackedCredentials : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('credui.dll')
CredPackAuthenticationBufferA = Fiddle::Function.new(
  lib['CredPackAuthenticationBufferA'],
  [
    -Fiddle::TYPE_INT,  # dwFlags : CRED_PACK_FLAGS
    Fiddle::TYPE_VOIDP,  # pszUserName : LPSTR
    Fiddle::TYPE_VOIDP,  # pszPassword : LPSTR
    Fiddle::TYPE_VOIDP,  # pPackedCredentials : BYTE* optional, out
    Fiddle::TYPE_VOIDP,  # pcbPackedCredentials : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "credui")]
extern "system" {
    fn CredPackAuthenticationBufferA(
        dwFlags: u32,  // CRED_PACK_FLAGS
        pszUserName: *mut u8,  // LPSTR
        pszPassword: *mut u8,  // LPSTR
        pPackedCredentials: *mut u8,  // BYTE* optional, out
        pcbPackedCredentials: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("credui.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool CredPackAuthenticationBufferA(uint dwFlags, [MarshalAs(UnmanagedType.LPStr)] string pszUserName, [MarshalAs(UnmanagedType.LPStr)] string pszPassword, IntPtr pPackedCredentials, ref uint pcbPackedCredentials);
"@
$api = Add-Type -MemberDefinition $sig -Name 'credui_CredPackAuthenticationBufferA' -Namespace Win32 -PassThru
# $api::CredPackAuthenticationBufferA(dwFlags, pszUserName, pszPassword, pPackedCredentials, pcbPackedCredentials)

#uselib "credui.dll"
#func global CredPackAuthenticationBufferA "CredPackAuthenticationBufferA" sptr, sptr, sptr, sptr, sptr
; CredPackAuthenticationBufferA dwFlags, pszUserName, pszPassword, varptr(pPackedCredentials), varptr(pcbPackedCredentials)   ; 戻り値は stat
; dwFlags : CRED_PACK_FLAGS -> "sptr"
; pszUserName : LPSTR -> "sptr"
; pszPassword : LPSTR -> "sptr"
; pPackedCredentials : BYTE* optional, out -> "sptr"
; pcbPackedCredentials : 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 "credui.dll"
#cfunc global CredPackAuthenticationBufferA "CredPackAuthenticationBufferA" int, str, str, var, var
; res = CredPackAuthenticationBufferA(dwFlags, pszUserName, pszPassword, pPackedCredentials, pcbPackedCredentials)
; dwFlags : CRED_PACK_FLAGS -> "int"
; pszUserName : LPSTR -> "str"
; pszPassword : LPSTR -> "str"
; pPackedCredentials : BYTE* optional, out -> "var"
; pcbPackedCredentials : 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 CredPackAuthenticationBufferA(CRED_PACK_FLAGS dwFlags, LPSTR pszUserName, LPSTR pszPassword, BYTE* pPackedCredentials, DWORD* pcbPackedCredentials)
#uselib "credui.dll"
#cfunc global CredPackAuthenticationBufferA "CredPackAuthenticationBufferA" int, str, str, var, var
; res = CredPackAuthenticationBufferA(dwFlags, pszUserName, pszPassword, pPackedCredentials, pcbPackedCredentials)
; dwFlags : CRED_PACK_FLAGS -> "int"
; pszUserName : LPSTR -> "str"
; pszPassword : LPSTR -> "str"
; pPackedCredentials : BYTE* optional, out -> "var"
; pcbPackedCredentials : 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 (
	credui = windows.NewLazySystemDLL("credui.dll")
	procCredPackAuthenticationBufferA = credui.NewProc("CredPackAuthenticationBufferA")
)

// dwFlags (CRED_PACK_FLAGS), pszUserName (LPSTR), pszPassword (LPSTR), pPackedCredentials (BYTE* optional, out), pcbPackedCredentials (DWORD* in/out)
r1, _, err := procCredPackAuthenticationBufferA.Call(
	uintptr(dwFlags),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszUserName))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszPassword))),
	uintptr(pPackedCredentials),
	uintptr(pcbPackedCredentials),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CredPackAuthenticationBufferA(
  dwFlags: DWORD;   // CRED_PACK_FLAGS
  pszUserName: PAnsiChar;   // LPSTR
  pszPassword: PAnsiChar;   // LPSTR
  pPackedCredentials: Pointer;   // BYTE* optional, out
  pcbPackedCredentials: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'credui.dll' name 'CredPackAuthenticationBufferA';

result := DllCall("credui\CredPackAuthenticationBufferA"
    , "UInt", dwFlags   ; CRED_PACK_FLAGS
    , "AStr", pszUserName   ; LPSTR
    , "AStr", pszPassword   ; LPSTR
    , "Ptr", pPackedCredentials   ; BYTE* optional, out
    , "Ptr", pcbPackedCredentials   ; DWORD* in/out
    , "Int")   ; return: BOOL

●CredPackAuthenticationBufferA(dwFlags, pszUserName, pszPassword, pPackedCredentials, pcbPackedCredentials) = DLL("credui.dll", "bool CredPackAuthenticationBufferA(dword, char*, char*, void*, void*)")
# 呼び出し: CredPackAuthenticationBufferA(dwFlags, pszUserName, pszPassword, pPackedCredentials, pcbPackedCredentials)
# dwFlags : CRED_PACK_FLAGS -> "dword"
# pszUserName : LPSTR -> "char*"
# pszPassword : LPSTR -> "char*"
# pPackedCredentials : BYTE* optional, out -> "void*"
# pcbPackedCredentials : 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)。