SCardLocateCardsA

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

INT SCardLocateCardsA(
    UINT_PTR hContext,
    LPCSTR mszCards,
    SCARD_READERSTATEA* rgReaderStates,
    DWORD cReaders
);

<DllImport("WinSCard.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SCardLocateCardsA(
    hContext As UIntPtr,   ' UINT_PTR
    <MarshalAs(UnmanagedType.LPStr)> mszCards As String,   ' LPCSTR
    rgReaderStates As IntPtr,   ' SCARD_READERSTATEA* in/out
    cReaders As UInteger   ' DWORD
) As Integer
End Function

' hContext : UINT_PTR
' mszCards : LPCSTR
' rgReaderStates : SCARD_READERSTATEA* in/out
' cReaders : DWORD
Declare PtrSafe Function SCardLocateCardsA Lib "winscard" ( _
    ByVal hContext As LongPtr, _
    ByVal mszCards As String, _
    ByVal rgReaderStates As LongPtr, _
    ByVal cReaders 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

SCardLocateCardsA = ctypes.windll.winscard.SCardLocateCardsA
SCardLocateCardsA.restype = ctypes.c_int
SCardLocateCardsA.argtypes = [
    ctypes.c_size_t,  # hContext : UINT_PTR
    wintypes.LPCSTR,  # mszCards : LPCSTR
    ctypes.c_void_p,  # rgReaderStates : SCARD_READERSTATEA* in/out
    wintypes.DWORD,  # cReaders : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WinSCard.dll')
SCardLocateCardsA = Fiddle::Function.new(
  lib['SCardLocateCardsA'],
  [
    Fiddle::TYPE_UINTPTR_T,  # hContext : UINT_PTR
    Fiddle::TYPE_VOIDP,  # mszCards : LPCSTR
    Fiddle::TYPE_VOIDP,  # rgReaderStates : SCARD_READERSTATEA* in/out
    -Fiddle::TYPE_INT,  # cReaders : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "winscard")]
extern "system" {
    fn SCardLocateCardsA(
        hContext: usize,  // UINT_PTR
        mszCards: *const u8,  // LPCSTR
        rgReaderStates: *mut SCARD_READERSTATEA,  // SCARD_READERSTATEA* in/out
        cReaders: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WinSCard.dll", CharSet = CharSet.Ansi)]
public static extern int SCardLocateCardsA(UIntPtr hContext, [MarshalAs(UnmanagedType.LPStr)] string mszCards, IntPtr rgReaderStates, uint cReaders);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WinSCard_SCardLocateCardsA' -Namespace Win32 -PassThru
# $api::SCardLocateCardsA(hContext, mszCards, rgReaderStates, cReaders)

#uselib "WinSCard.dll"
#func global SCardLocateCardsA "SCardLocateCardsA" sptr, sptr, sptr, sptr
; SCardLocateCardsA hContext, mszCards, varptr(rgReaderStates), cReaders   ; 戻り値は stat
; hContext : UINT_PTR -> "sptr"
; mszCards : LPCSTR -> "sptr"
; rgReaderStates : SCARD_READERSTATEA* in/out -> "sptr"
; cReaders : 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 "WinSCard.dll"
#cfunc global SCardLocateCardsA "SCardLocateCardsA" sptr, str, var, int
; res = SCardLocateCardsA(hContext, mszCards, rgReaderStates, cReaders)
; hContext : UINT_PTR -> "sptr"
; mszCards : LPCSTR -> "str"
; rgReaderStates : SCARD_READERSTATEA* in/out -> "var"
; cReaders : 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。

; INT SCardLocateCardsA(UINT_PTR hContext, LPCSTR mszCards, SCARD_READERSTATEA* rgReaderStates, DWORD cReaders)
#uselib "WinSCard.dll"
#cfunc global SCardLocateCardsA "SCardLocateCardsA" intptr, str, var, int
; res = SCardLocateCardsA(hContext, mszCards, rgReaderStates, cReaders)
; hContext : UINT_PTR -> "intptr"
; mszCards : LPCSTR -> "str"
; rgReaderStates : SCARD_READERSTATEA* in/out -> "var"
; cReaders : 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 (
	winscard = windows.NewLazySystemDLL("WinSCard.dll")
	procSCardLocateCardsA = winscard.NewProc("SCardLocateCardsA")
)

// hContext (UINT_PTR), mszCards (LPCSTR), rgReaderStates (SCARD_READERSTATEA* in/out), cReaders (DWORD)
r1, _, err := procSCardLocateCardsA.Call(
	uintptr(hContext),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(mszCards))),
	uintptr(rgReaderStates),
	uintptr(cReaders),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SCardLocateCardsA(
  hContext: NativeUInt;   // UINT_PTR
  mszCards: PAnsiChar;   // LPCSTR
  rgReaderStates: Pointer;   // SCARD_READERSTATEA* in/out
  cReaders: DWORD   // DWORD
): Integer; stdcall;
  external 'WinSCard.dll' name 'SCardLocateCardsA';

result := DllCall("WinSCard\SCardLocateCardsA"
    , "UPtr", hContext   ; UINT_PTR
    , "AStr", mszCards   ; LPCSTR
    , "Ptr", rgReaderStates   ; SCARD_READERSTATEA* in/out
    , "UInt", cReaders   ; DWORD
    , "Int")   ; return: INT

●SCardLocateCardsA(hContext, mszCards, rgReaderStates, cReaders) = DLL("WinSCard.dll", "int SCardLocateCardsA(int, char*, void*, dword)")
# 呼び出し: SCardLocateCardsA(hContext, mszCards, rgReaderStates, cReaders)
# hContext : UINT_PTR -> "int"
# mszCards : LPCSTR -> "char*"
# rgReaderStates : SCARD_READERSTATEA* in/out -> "void*"
# cReaders : 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)。