SCardGetStatusChangeW

// WinSCard.dll  (Unicode / -W)
#include <windows.h>

INT SCardGetStatusChangeW(
    UINT_PTR hContext,
    DWORD dwTimeout,
    SCARD_READERSTATEW* rgReaderStates,
    DWORD cReaders
);

<DllImport("WinSCard.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function SCardGetStatusChangeW(
    hContext As UIntPtr,   ' UINT_PTR
    dwTimeout As UInteger,   ' DWORD
    rgReaderStates As IntPtr,   ' SCARD_READERSTATEW* in/out
    cReaders As UInteger   ' DWORD
) As Integer
End Function

' hContext : UINT_PTR
' dwTimeout : DWORD
' rgReaderStates : SCARD_READERSTATEW* in/out
' cReaders : DWORD
Declare PtrSafe Function SCardGetStatusChangeW Lib "winscard" ( _
    ByVal hContext As LongPtr, _
    ByVal dwTimeout As Long, _
    ByVal rgReaderStates As LongPtr, _
    ByVal cReaders As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SCardGetStatusChangeW = ctypes.windll.winscard.SCardGetStatusChangeW
SCardGetStatusChangeW.restype = ctypes.c_int
SCardGetStatusChangeW.argtypes = [
    ctypes.c_size_t,  # hContext : UINT_PTR
    wintypes.DWORD,  # dwTimeout : DWORD
    ctypes.c_void_p,  # rgReaderStates : SCARD_READERSTATEW* in/out
    wintypes.DWORD,  # cReaders : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WinSCard.dll')
SCardGetStatusChangeW = Fiddle::Function.new(
  lib['SCardGetStatusChangeW'],
  [
    Fiddle::TYPE_UINTPTR_T,  # hContext : UINT_PTR
    -Fiddle::TYPE_INT,  # dwTimeout : DWORD
    Fiddle::TYPE_VOIDP,  # rgReaderStates : SCARD_READERSTATEW* in/out
    -Fiddle::TYPE_INT,  # cReaders : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

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

$sig = @"
[DllImport("WinSCard.dll", CharSet = CharSet.Unicode)]
public static extern int SCardGetStatusChangeW(UIntPtr hContext, uint dwTimeout, IntPtr rgReaderStates, uint cReaders);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WinSCard_SCardGetStatusChangeW' -Namespace Win32 -PassThru
# $api::SCardGetStatusChangeW(hContext, dwTimeout, rgReaderStates, cReaders)

#uselib "WinSCard.dll"
#func global SCardGetStatusChangeW "SCardGetStatusChangeW" wptr, wptr, wptr, wptr
; SCardGetStatusChangeW hContext, dwTimeout, varptr(rgReaderStates), cReaders   ; 戻り値は stat
; hContext : UINT_PTR -> "wptr"
; dwTimeout : DWORD -> "wptr"
; rgReaderStates : SCARD_READERSTATEW* in/out -> "wptr"
; cReaders : DWORD -> "wptr"
; ※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 SCardGetStatusChangeW "SCardGetStatusChangeW" sptr, int, var, int
; res = SCardGetStatusChangeW(hContext, dwTimeout, rgReaderStates, cReaders)
; hContext : UINT_PTR -> "sptr"
; dwTimeout : DWORD -> "int"
; rgReaderStates : SCARD_READERSTATEW* 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 SCardGetStatusChangeW(UINT_PTR hContext, DWORD dwTimeout, SCARD_READERSTATEW* rgReaderStates, DWORD cReaders)
#uselib "WinSCard.dll"
#cfunc global SCardGetStatusChangeW "SCardGetStatusChangeW" intptr, int, var, int
; res = SCardGetStatusChangeW(hContext, dwTimeout, rgReaderStates, cReaders)
; hContext : UINT_PTR -> "intptr"
; dwTimeout : DWORD -> "int"
; rgReaderStates : SCARD_READERSTATEW* 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")
	procSCardGetStatusChangeW = winscard.NewProc("SCardGetStatusChangeW")
)

// hContext (UINT_PTR), dwTimeout (DWORD), rgReaderStates (SCARD_READERSTATEW* in/out), cReaders (DWORD)
r1, _, err := procSCardGetStatusChangeW.Call(
	uintptr(hContext),
	uintptr(dwTimeout),
	uintptr(rgReaderStates),
	uintptr(cReaders),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SCardGetStatusChangeW(
  hContext: NativeUInt;   // UINT_PTR
  dwTimeout: DWORD;   // DWORD
  rgReaderStates: Pointer;   // SCARD_READERSTATEW* in/out
  cReaders: DWORD   // DWORD
): Integer; stdcall;
  external 'WinSCard.dll' name 'SCardGetStatusChangeW';

result := DllCall("WinSCard\SCardGetStatusChangeW"
    , "UPtr", hContext   ; UINT_PTR
    , "UInt", dwTimeout   ; DWORD
    , "Ptr", rgReaderStates   ; SCARD_READERSTATEW* in/out
    , "UInt", cReaders   ; DWORD
    , "Int")   ; return: INT

●SCardGetStatusChangeW(hContext, dwTimeout, rgReaderStates, cReaders) = DLL("WinSCard.dll", "int SCardGetStatusChangeW(int, dword, void*, dword)")
# 呼び出し: SCardGetStatusChangeW(hContext, dwTimeout, rgReaderStates, cReaders)
# hContext : UINT_PTR -> "int"
# dwTimeout : DWORD -> "dword"
# rgReaderStates : SCARD_READERSTATEW* 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。