SCardConnectW

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

INT SCardConnectW(
    UINT_PTR hContext,
    LPCWSTR szReader,
    DWORD dwShareMode,
    DWORD dwPreferredProtocols,
    UINT_PTR* phCard,
    DWORD* pdwActiveProtocol
);

<DllImport("WinSCard.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function SCardConnectW(
    hContext As UIntPtr,   ' UINT_PTR
    <MarshalAs(UnmanagedType.LPWStr)> szReader As String,   ' LPCWSTR
    dwShareMode As UInteger,   ' DWORD
    dwPreferredProtocols As UInteger,   ' DWORD
    <Out> ByRef phCard As UIntPtr,   ' UINT_PTR* out
    <Out> ByRef pdwActiveProtocol As UInteger   ' DWORD* out
) As Integer
End Function

' hContext : UINT_PTR
' szReader : LPCWSTR
' dwShareMode : DWORD
' dwPreferredProtocols : DWORD
' phCard : UINT_PTR* out
' pdwActiveProtocol : DWORD* out
Declare PtrSafe Function SCardConnectW Lib "winscard" ( _
    ByVal hContext As LongPtr, _
    ByVal szReader As LongPtr, _
    ByVal dwShareMode As Long, _
    ByVal dwPreferredProtocols As Long, _
    ByRef phCard As LongPtr, _
    ByRef pdwActiveProtocol 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

SCardConnectW = ctypes.windll.winscard.SCardConnectW
SCardConnectW.restype = ctypes.c_int
SCardConnectW.argtypes = [
    ctypes.c_size_t,  # hContext : UINT_PTR
    wintypes.LPCWSTR,  # szReader : LPCWSTR
    wintypes.DWORD,  # dwShareMode : DWORD
    wintypes.DWORD,  # dwPreferredProtocols : DWORD
    ctypes.POINTER(ctypes.c_size_t),  # phCard : UINT_PTR* out
    ctypes.POINTER(wintypes.DWORD),  # pdwActiveProtocol : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WinSCard.dll')
SCardConnectW = Fiddle::Function.new(
  lib['SCardConnectW'],
  [
    Fiddle::TYPE_UINTPTR_T,  # hContext : UINT_PTR
    Fiddle::TYPE_VOIDP,  # szReader : LPCWSTR
    -Fiddle::TYPE_INT,  # dwShareMode : DWORD
    -Fiddle::TYPE_INT,  # dwPreferredProtocols : DWORD
    Fiddle::TYPE_VOIDP,  # phCard : UINT_PTR* out
    Fiddle::TYPE_VOIDP,  # pdwActiveProtocol : DWORD* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "winscard")]
extern "system" {
    fn SCardConnectW(
        hContext: usize,  // UINT_PTR
        szReader: *const u16,  // LPCWSTR
        dwShareMode: u32,  // DWORD
        dwPreferredProtocols: u32,  // DWORD
        phCard: *mut usize,  // UINT_PTR* out
        pdwActiveProtocol: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WinSCard.dll", CharSet = CharSet.Unicode)]
public static extern int SCardConnectW(UIntPtr hContext, [MarshalAs(UnmanagedType.LPWStr)] string szReader, uint dwShareMode, uint dwPreferredProtocols, out UIntPtr phCard, out uint pdwActiveProtocol);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WinSCard_SCardConnectW' -Namespace Win32 -PassThru
# $api::SCardConnectW(hContext, szReader, dwShareMode, dwPreferredProtocols, phCard, pdwActiveProtocol)

#uselib "WinSCard.dll"
#func global SCardConnectW "SCardConnectW" wptr, wptr, wptr, wptr, wptr, wptr
; SCardConnectW hContext, szReader, dwShareMode, dwPreferredProtocols, varptr(phCard), varptr(pdwActiveProtocol)   ; 戻り値は stat
; hContext : UINT_PTR -> "wptr"
; szReader : LPCWSTR -> "wptr"
; dwShareMode : DWORD -> "wptr"
; dwPreferredProtocols : DWORD -> "wptr"
; phCard : UINT_PTR* out -> "wptr"
; pdwActiveProtocol : DWORD* out -> "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 SCardConnectW "SCardConnectW" sptr, wstr, int, int, var, var
; res = SCardConnectW(hContext, szReader, dwShareMode, dwPreferredProtocols, phCard, pdwActiveProtocol)
; hContext : UINT_PTR -> "sptr"
; szReader : LPCWSTR -> "wstr"
; dwShareMode : DWORD -> "int"
; dwPreferredProtocols : DWORD -> "int"
; phCard : UINT_PTR* out -> "var"
; pdwActiveProtocol : DWORD* 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 SCardConnectW(UINT_PTR hContext, LPCWSTR szReader, DWORD dwShareMode, DWORD dwPreferredProtocols, UINT_PTR* phCard, DWORD* pdwActiveProtocol)
#uselib "WinSCard.dll"
#cfunc global SCardConnectW "SCardConnectW" intptr, wstr, int, int, var, var
; res = SCardConnectW(hContext, szReader, dwShareMode, dwPreferredProtocols, phCard, pdwActiveProtocol)
; hContext : UINT_PTR -> "intptr"
; szReader : LPCWSTR -> "wstr"
; dwShareMode : DWORD -> "int"
; dwPreferredProtocols : DWORD -> "int"
; phCard : UINT_PTR* out -> "var"
; pdwActiveProtocol : DWORD* 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")
	procSCardConnectW = winscard.NewProc("SCardConnectW")
)

// hContext (UINT_PTR), szReader (LPCWSTR), dwShareMode (DWORD), dwPreferredProtocols (DWORD), phCard (UINT_PTR* out), pdwActiveProtocol (DWORD* out)
r1, _, err := procSCardConnectW.Call(
	uintptr(hContext),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szReader))),
	uintptr(dwShareMode),
	uintptr(dwPreferredProtocols),
	uintptr(phCard),
	uintptr(pdwActiveProtocol),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SCardConnectW(
  hContext: NativeUInt;   // UINT_PTR
  szReader: PWideChar;   // LPCWSTR
  dwShareMode: DWORD;   // DWORD
  dwPreferredProtocols: DWORD;   // DWORD
  phCard: Pointer;   // UINT_PTR* out
  pdwActiveProtocol: Pointer   // DWORD* out
): Integer; stdcall;
  external 'WinSCard.dll' name 'SCardConnectW';

result := DllCall("WinSCard\SCardConnectW"
    , "UPtr", hContext   ; UINT_PTR
    , "WStr", szReader   ; LPCWSTR
    , "UInt", dwShareMode   ; DWORD
    , "UInt", dwPreferredProtocols   ; DWORD
    , "Ptr", phCard   ; UINT_PTR* out
    , "Ptr", pdwActiveProtocol   ; DWORD* out
    , "Int")   ; return: INT

●SCardConnectW(hContext, szReader, dwShareMode, dwPreferredProtocols, phCard, pdwActiveProtocol) = DLL("WinSCard.dll", "int SCardConnectW(int, char*, dword, dword, void*, void*)")
# 呼び出し: SCardConnectW(hContext, szReader, dwShareMode, dwPreferredProtocols, phCard, pdwActiveProtocol)
# hContext : UINT_PTR -> "int"
# szReader : LPCWSTR -> "char*"
# dwShareMode : DWORD -> "dword"
# dwPreferredProtocols : DWORD -> "dword"
# phCard : UINT_PTR* out -> "void*"
# pdwActiveProtocol : DWORD* 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。