CredFindBestCredentialA

// ADVAPI32.dll  (ANSI / -A)
#include <windows.h>

BOOL CredFindBestCredentialA(
    LPCSTR TargetName,
    DWORD Type,
    DWORD Flags,
    CREDENTIALA** Credential
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CredFindBestCredentialA(
    <MarshalAs(UnmanagedType.LPStr)> TargetName As String,   ' LPCSTR
    Type As UInteger,   ' DWORD
    Flags As UInteger,   ' DWORD
    Credential As IntPtr   ' CREDENTIALA** out
) As Boolean
End Function

' TargetName : LPCSTR
' Type : DWORD
' Flags : DWORD
' Credential : CREDENTIALA** out
Declare PtrSafe Function CredFindBestCredentialA Lib "advapi32" ( _
    ByVal TargetName As String, _
    ByVal Type As Long, _
    ByVal Flags As Long, _
    ByVal Credential As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CredFindBestCredentialA = ctypes.windll.advapi32.CredFindBestCredentialA
CredFindBestCredentialA.restype = wintypes.BOOL
CredFindBestCredentialA.argtypes = [
    wintypes.LPCSTR,  # TargetName : LPCSTR
    wintypes.DWORD,  # Type : DWORD
    wintypes.DWORD,  # Flags : DWORD
    ctypes.c_void_p,  # Credential : CREDENTIALA** out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
CredFindBestCredentialA = Fiddle::Function.new(
  lib['CredFindBestCredentialA'],
  [
    Fiddle::TYPE_VOIDP,  # TargetName : LPCSTR
    -Fiddle::TYPE_INT,  # Type : DWORD
    -Fiddle::TYPE_INT,  # Flags : DWORD
    Fiddle::TYPE_VOIDP,  # Credential : CREDENTIALA** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "advapi32")]
extern "system" {
    fn CredFindBestCredentialA(
        TargetName: *const u8,  // LPCSTR
        Type: u32,  // DWORD
        Flags: u32,  // DWORD
        Credential: *mut *mut CREDENTIALA  // CREDENTIALA** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool CredFindBestCredentialA([MarshalAs(UnmanagedType.LPStr)] string TargetName, uint Type, uint Flags, IntPtr Credential);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_CredFindBestCredentialA' -Namespace Win32 -PassThru
# $api::CredFindBestCredentialA(TargetName, Type, Flags, Credential)

#uselib "ADVAPI32.dll"
#func global CredFindBestCredentialA "CredFindBestCredentialA" sptr, sptr, sptr, sptr
; CredFindBestCredentialA TargetName, Type, Flags, varptr(Credential)   ; 戻り値は stat
; TargetName : LPCSTR -> "sptr"
; Type : DWORD -> "sptr"
; Flags : DWORD -> "sptr"
; Credential : CREDENTIALA** 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 "ADVAPI32.dll"
#cfunc global CredFindBestCredentialA "CredFindBestCredentialA" str, int, int, var
; res = CredFindBestCredentialA(TargetName, Type, Flags, Credential)
; TargetName : LPCSTR -> "str"
; Type : DWORD -> "int"
; Flags : DWORD -> "int"
; Credential : CREDENTIALA** 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 CredFindBestCredentialA(LPCSTR TargetName, DWORD Type, DWORD Flags, CREDENTIALA** Credential)
#uselib "ADVAPI32.dll"
#cfunc global CredFindBestCredentialA "CredFindBestCredentialA" str, int, int, var
; res = CredFindBestCredentialA(TargetName, Type, Flags, Credential)
; TargetName : LPCSTR -> "str"
; Type : DWORD -> "int"
; Flags : DWORD -> "int"
; Credential : CREDENTIALA** 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 (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procCredFindBestCredentialA = advapi32.NewProc("CredFindBestCredentialA")
)

// TargetName (LPCSTR), Type (DWORD), Flags (DWORD), Credential (CREDENTIALA** out)
r1, _, err := procCredFindBestCredentialA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(TargetName))),
	uintptr(Type),
	uintptr(Flags),
	uintptr(Credential),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CredFindBestCredentialA(
  TargetName: PAnsiChar;   // LPCSTR
  Type: DWORD;   // DWORD
  Flags: DWORD;   // DWORD
  Credential: Pointer   // CREDENTIALA** out
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'CredFindBestCredentialA';

result := DllCall("ADVAPI32\CredFindBestCredentialA"
    , "AStr", TargetName   ; LPCSTR
    , "UInt", Type   ; DWORD
    , "UInt", Flags   ; DWORD
    , "Ptr", Credential   ; CREDENTIALA** out
    , "Int")   ; return: BOOL

●CredFindBestCredentialA(TargetName, Type, Flags, Credential) = DLL("ADVAPI32.dll", "bool CredFindBestCredentialA(char*, dword, dword, void*)")
# 呼び出し: CredFindBestCredentialA(TargetName, Type, Flags, Credential)
# TargetName : LPCSTR -> "char*"
# Type : DWORD -> "dword"
# Flags : DWORD -> "dword"
# Credential : CREDENTIALA** 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)。