NCryptEnumStorageProviders

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

HRESULT NCryptEnumStorageProviders(
    DWORD* pdwProviderCount,
    NCryptProviderName** ppProviderList,
    DWORD dwFlags
);

<DllImport("ncrypt.dll", ExactSpelling:=True)>
Public Shared Function NCryptEnumStorageProviders(
    <Out> ByRef pdwProviderCount As UInteger,   ' DWORD* out
    ppProviderList As IntPtr,   ' NCryptProviderName** out
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' pdwProviderCount : DWORD* out
' ppProviderList : NCryptProviderName** out
' dwFlags : DWORD
Declare PtrSafe Function NCryptEnumStorageProviders Lib "ncrypt" ( _
    ByRef pdwProviderCount As Long, _
    ByVal ppProviderList As LongPtr, _
    ByVal dwFlags 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

NCryptEnumStorageProviders = ctypes.windll.ncrypt.NCryptEnumStorageProviders
NCryptEnumStorageProviders.restype = ctypes.c_int
NCryptEnumStorageProviders.argtypes = [
    ctypes.POINTER(wintypes.DWORD),  # pdwProviderCount : DWORD* out
    ctypes.c_void_p,  # ppProviderList : NCryptProviderName** out
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ncrypt.dll')
NCryptEnumStorageProviders = Fiddle::Function.new(
  lib['NCryptEnumStorageProviders'],
  [
    Fiddle::TYPE_VOIDP,  # pdwProviderCount : DWORD* out
    Fiddle::TYPE_VOIDP,  # ppProviderList : NCryptProviderName** out
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "ncrypt")]
extern "system" {
    fn NCryptEnumStorageProviders(
        pdwProviderCount: *mut u32,  // DWORD* out
        ppProviderList: *mut *mut NCryptProviderName,  // NCryptProviderName** out
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ncrypt.dll")]
public static extern int NCryptEnumStorageProviders(out uint pdwProviderCount, IntPtr ppProviderList, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ncrypt_NCryptEnumStorageProviders' -Namespace Win32 -PassThru
# $api::NCryptEnumStorageProviders(pdwProviderCount, ppProviderList, dwFlags)

#uselib "ncrypt.dll"
#func global NCryptEnumStorageProviders "NCryptEnumStorageProviders" sptr, sptr, sptr
; NCryptEnumStorageProviders varptr(pdwProviderCount), varptr(ppProviderList), dwFlags   ; 戻り値は stat
; pdwProviderCount : DWORD* out -> "sptr"
; ppProviderList : NCryptProviderName** out -> "sptr"
; dwFlags : DWORD -> "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 "ncrypt.dll"
#cfunc global NCryptEnumStorageProviders "NCryptEnumStorageProviders" var, var, int
; res = NCryptEnumStorageProviders(pdwProviderCount, ppProviderList, dwFlags)
; pdwProviderCount : DWORD* out -> "var"
; ppProviderList : NCryptProviderName** out -> "var"
; dwFlags : DWORD -> "int"
; ※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 NCryptEnumStorageProviders(DWORD* pdwProviderCount, NCryptProviderName** ppProviderList, DWORD dwFlags)
#uselib "ncrypt.dll"
#cfunc global NCryptEnumStorageProviders "NCryptEnumStorageProviders" var, var, int
; res = NCryptEnumStorageProviders(pdwProviderCount, ppProviderList, dwFlags)
; pdwProviderCount : DWORD* out -> "var"
; ppProviderList : NCryptProviderName** out -> "var"
; dwFlags : DWORD -> "int"
; ※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 (
	ncrypt = windows.NewLazySystemDLL("ncrypt.dll")
	procNCryptEnumStorageProviders = ncrypt.NewProc("NCryptEnumStorageProviders")
)

// pdwProviderCount (DWORD* out), ppProviderList (NCryptProviderName** out), dwFlags (DWORD)
r1, _, err := procNCryptEnumStorageProviders.Call(
	uintptr(pdwProviderCount),
	uintptr(ppProviderList),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function NCryptEnumStorageProviders(
  pdwProviderCount: Pointer;   // DWORD* out
  ppProviderList: Pointer;   // NCryptProviderName** out
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'ncrypt.dll' name 'NCryptEnumStorageProviders';

result := DllCall("ncrypt\NCryptEnumStorageProviders"
    , "Ptr", pdwProviderCount   ; DWORD* out
    , "Ptr", ppProviderList   ; NCryptProviderName** out
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: HRESULT

●NCryptEnumStorageProviders(pdwProviderCount, ppProviderList, dwFlags) = DLL("ncrypt.dll", "int NCryptEnumStorageProviders(void*, void*, dword)")
# 呼び出し: NCryptEnumStorageProviders(pdwProviderCount, ppProviderList, dwFlags)
# pdwProviderCount : DWORD* out -> "void*"
# ppProviderList : NCryptProviderName** out -> "void*"
# dwFlags : DWORD -> "dword"
# 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)。