CredIsProtectedA

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

BOOL CredIsProtectedA(
    LPSTR pszProtectedCredentials,
    CRED_PROTECTION_TYPE* pProtectionType
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CredIsProtectedA(
    <MarshalAs(UnmanagedType.LPStr)> pszProtectedCredentials As String,   ' LPSTR
    <Out> ByRef pProtectionType As Integer   ' CRED_PROTECTION_TYPE* out
) As Boolean
End Function

' pszProtectedCredentials : LPSTR
' pProtectionType : CRED_PROTECTION_TYPE* out
Declare PtrSafe Function CredIsProtectedA Lib "advapi32" ( _
    ByVal pszProtectedCredentials As String, _
    ByRef pProtectionType 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

CredIsProtectedA = ctypes.windll.advapi32.CredIsProtectedA
CredIsProtectedA.restype = wintypes.BOOL
CredIsProtectedA.argtypes = [
    wintypes.LPCSTR,  # pszProtectedCredentials : LPSTR
    ctypes.c_void_p,  # pProtectionType : CRED_PROTECTION_TYPE* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
CredIsProtectedA = Fiddle::Function.new(
  lib['CredIsProtectedA'],
  [
    Fiddle::TYPE_VOIDP,  # pszProtectedCredentials : LPSTR
    Fiddle::TYPE_VOIDP,  # pProtectionType : CRED_PROTECTION_TYPE* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "advapi32")]
extern "system" {
    fn CredIsProtectedA(
        pszProtectedCredentials: *mut u8,  // LPSTR
        pProtectionType: *mut i32  // CRED_PROTECTION_TYPE* 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 CredIsProtectedA([MarshalAs(UnmanagedType.LPStr)] string pszProtectedCredentials, out int pProtectionType);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_CredIsProtectedA' -Namespace Win32 -PassThru
# $api::CredIsProtectedA(pszProtectedCredentials, pProtectionType)

#uselib "ADVAPI32.dll"
#func global CredIsProtectedA "CredIsProtectedA" sptr, sptr
; CredIsProtectedA pszProtectedCredentials, pProtectionType   ; 戻り値は stat
; pszProtectedCredentials : LPSTR -> "sptr"
; pProtectionType : CRED_PROTECTION_TYPE* 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 CredIsProtectedA "CredIsProtectedA" str, int
; res = CredIsProtectedA(pszProtectedCredentials, pProtectionType)
; pszProtectedCredentials : LPSTR -> "str"
; pProtectionType : CRED_PROTECTION_TYPE* out -> "int"

; BOOL CredIsProtectedA(LPSTR pszProtectedCredentials, CRED_PROTECTION_TYPE* pProtectionType)
#uselib "ADVAPI32.dll"
#cfunc global CredIsProtectedA "CredIsProtectedA" str, int
; res = CredIsProtectedA(pszProtectedCredentials, pProtectionType)
; pszProtectedCredentials : LPSTR -> "str"
; pProtectionType : CRED_PROTECTION_TYPE* out -> "int"

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

var (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procCredIsProtectedA = advapi32.NewProc("CredIsProtectedA")
)

// pszProtectedCredentials (LPSTR), pProtectionType (CRED_PROTECTION_TYPE* out)
r1, _, err := procCredIsProtectedA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszProtectedCredentials))),
	uintptr(pProtectionType),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CredIsProtectedA(
  pszProtectedCredentials: PAnsiChar;   // LPSTR
  pProtectionType: Pointer   // CRED_PROTECTION_TYPE* out
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'CredIsProtectedA';

result := DllCall("ADVAPI32\CredIsProtectedA"
    , "AStr", pszProtectedCredentials   ; LPSTR
    , "Ptr", pProtectionType   ; CRED_PROTECTION_TYPE* out
    , "Int")   ; return: BOOL

●CredIsProtectedA(pszProtectedCredentials, pProtectionType) = DLL("ADVAPI32.dll", "bool CredIsProtectedA(char*, void*)")
# 呼び出し: CredIsProtectedA(pszProtectedCredentials, pProtectionType)
# pszProtectedCredentials : LPSTR -> "char*"
# pProtectionType : CRED_PROTECTION_TYPE* 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)。