SCardState

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

INT SCardState(
    UINT_PTR hCard,
    DWORD* pdwState,
    DWORD* pdwProtocol,
    BYTE* pbAtr,
    DWORD* pcbAtrLen
);

<DllImport("WinSCard.dll", ExactSpelling:=True)>
Public Shared Function SCardState(
    hCard As UIntPtr,   ' UINT_PTR
    <Out> ByRef pdwState As UInteger,   ' DWORD* out
    <Out> ByRef pdwProtocol As UInteger,   ' DWORD* out
    pbAtr As IntPtr,   ' BYTE* out
    ByRef pcbAtrLen As UInteger   ' DWORD* in/out
) As Integer
End Function

' hCard : UINT_PTR
' pdwState : DWORD* out
' pdwProtocol : DWORD* out
' pbAtr : BYTE* out
' pcbAtrLen : DWORD* in/out
Declare PtrSafe Function SCardState Lib "winscard" ( _
    ByVal hCard As LongPtr, _
    ByRef pdwState As Long, _
    ByRef pdwProtocol As Long, _
    ByVal pbAtr As LongPtr, _
    ByRef pcbAtrLen 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

SCardState = ctypes.windll.winscard.SCardState
SCardState.restype = ctypes.c_int
SCardState.argtypes = [
    ctypes.c_size_t,  # hCard : UINT_PTR
    ctypes.POINTER(wintypes.DWORD),  # pdwState : DWORD* out
    ctypes.POINTER(wintypes.DWORD),  # pdwProtocol : DWORD* out
    ctypes.POINTER(ctypes.c_ubyte),  # pbAtr : BYTE* out
    ctypes.POINTER(wintypes.DWORD),  # pcbAtrLen : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WinSCard.dll')
SCardState = Fiddle::Function.new(
  lib['SCardState'],
  [
    Fiddle::TYPE_UINTPTR_T,  # hCard : UINT_PTR
    Fiddle::TYPE_VOIDP,  # pdwState : DWORD* out
    Fiddle::TYPE_VOIDP,  # pdwProtocol : DWORD* out
    Fiddle::TYPE_VOIDP,  # pbAtr : BYTE* out
    Fiddle::TYPE_VOIDP,  # pcbAtrLen : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "winscard")]
extern "system" {
    fn SCardState(
        hCard: usize,  // UINT_PTR
        pdwState: *mut u32,  // DWORD* out
        pdwProtocol: *mut u32,  // DWORD* out
        pbAtr: *mut u8,  // BYTE* out
        pcbAtrLen: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WinSCard.dll")]
public static extern int SCardState(UIntPtr hCard, out uint pdwState, out uint pdwProtocol, IntPtr pbAtr, ref uint pcbAtrLen);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WinSCard_SCardState' -Namespace Win32 -PassThru
# $api::SCardState(hCard, pdwState, pdwProtocol, pbAtr, pcbAtrLen)

#uselib "WinSCard.dll"
#func global SCardState "SCardState" sptr, sptr, sptr, sptr, sptr
; SCardState hCard, varptr(pdwState), varptr(pdwProtocol), varptr(pbAtr), varptr(pcbAtrLen)   ; 戻り値は stat
; hCard : UINT_PTR -> "sptr"
; pdwState : DWORD* out -> "sptr"
; pdwProtocol : DWORD* out -> "sptr"
; pbAtr : BYTE* out -> "sptr"
; pcbAtrLen : 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 "WinSCard.dll"
#cfunc global SCardState "SCardState" sptr, var, var, var, var
; res = SCardState(hCard, pdwState, pdwProtocol, pbAtr, pcbAtrLen)
; hCard : UINT_PTR -> "sptr"
; pdwState : DWORD* out -> "var"
; pdwProtocol : DWORD* out -> "var"
; pbAtr : BYTE* out -> "var"
; pcbAtrLen : 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。

; INT SCardState(UINT_PTR hCard, DWORD* pdwState, DWORD* pdwProtocol, BYTE* pbAtr, DWORD* pcbAtrLen)
#uselib "WinSCard.dll"
#cfunc global SCardState "SCardState" intptr, var, var, var, var
; res = SCardState(hCard, pdwState, pdwProtocol, pbAtr, pcbAtrLen)
; hCard : UINT_PTR -> "intptr"
; pdwState : DWORD* out -> "var"
; pdwProtocol : DWORD* out -> "var"
; pbAtr : BYTE* out -> "var"
; pcbAtrLen : 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 (
	winscard = windows.NewLazySystemDLL("WinSCard.dll")
	procSCardState = winscard.NewProc("SCardState")
)

// hCard (UINT_PTR), pdwState (DWORD* out), pdwProtocol (DWORD* out), pbAtr (BYTE* out), pcbAtrLen (DWORD* in/out)
r1, _, err := procSCardState.Call(
	uintptr(hCard),
	uintptr(pdwState),
	uintptr(pdwProtocol),
	uintptr(pbAtr),
	uintptr(pcbAtrLen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SCardState(
  hCard: NativeUInt;   // UINT_PTR
  pdwState: Pointer;   // DWORD* out
  pdwProtocol: Pointer;   // DWORD* out
  pbAtr: Pointer;   // BYTE* out
  pcbAtrLen: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'WinSCard.dll' name 'SCardState';

result := DllCall("WinSCard\SCardState"
    , "UPtr", hCard   ; UINT_PTR
    , "Ptr", pdwState   ; DWORD* out
    , "Ptr", pdwProtocol   ; DWORD* out
    , "Ptr", pbAtr   ; BYTE* out
    , "Ptr", pcbAtrLen   ; DWORD* in/out
    , "Int")   ; return: INT

●SCardState(hCard, pdwState, pdwProtocol, pbAtr, pcbAtrLen) = DLL("WinSCard.dll", "int SCardState(int, void*, void*, void*, void*)")
# 呼び出し: SCardState(hCard, pdwState, pdwProtocol, pbAtr, pcbAtrLen)
# hCard : UINT_PTR -> "int"
# pdwState : DWORD* out -> "void*"
# pdwProtocol : DWORD* out -> "void*"
# pbAtr : BYTE* out -> "void*"
# pcbAtrLen : 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)。