SCardGetReaderIconW

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

INT SCardGetReaderIconW(
    UINT_PTR hContext,
    LPCWSTR szReaderName,
    BYTE* pbIcon,
    DWORD* pcbIcon
);

<DllImport("WinSCard.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function SCardGetReaderIconW(
    hContext As UIntPtr,   ' UINT_PTR
    <MarshalAs(UnmanagedType.LPWStr)> szReaderName As String,   ' LPCWSTR
    pbIcon As IntPtr,   ' BYTE* out
    ByRef pcbIcon As UInteger   ' DWORD* in/out
) As Integer
End Function

' hContext : UINT_PTR
' szReaderName : LPCWSTR
' pbIcon : BYTE* out
' pcbIcon : DWORD* in/out
Declare PtrSafe Function SCardGetReaderIconW Lib "winscard" ( _
    ByVal hContext As LongPtr, _
    ByVal szReaderName As LongPtr, _
    ByVal pbIcon As LongPtr, _
    ByRef pcbIcon 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

SCardGetReaderIconW = ctypes.windll.winscard.SCardGetReaderIconW
SCardGetReaderIconW.restype = ctypes.c_int
SCardGetReaderIconW.argtypes = [
    ctypes.c_size_t,  # hContext : UINT_PTR
    wintypes.LPCWSTR,  # szReaderName : LPCWSTR
    ctypes.POINTER(ctypes.c_ubyte),  # pbIcon : BYTE* out
    ctypes.POINTER(wintypes.DWORD),  # pcbIcon : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WinSCard.dll')
SCardGetReaderIconW = Fiddle::Function.new(
  lib['SCardGetReaderIconW'],
  [
    Fiddle::TYPE_UINTPTR_T,  # hContext : UINT_PTR
    Fiddle::TYPE_VOIDP,  # szReaderName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pbIcon : BYTE* out
    Fiddle::TYPE_VOIDP,  # pcbIcon : DWORD* in/out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "winscard")]
extern "system" {
    fn SCardGetReaderIconW(
        hContext: usize,  // UINT_PTR
        szReaderName: *const u16,  // LPCWSTR
        pbIcon: *mut u8,  // BYTE* out
        pcbIcon: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WinSCard.dll", CharSet = CharSet.Unicode)]
public static extern int SCardGetReaderIconW(UIntPtr hContext, [MarshalAs(UnmanagedType.LPWStr)] string szReaderName, IntPtr pbIcon, ref uint pcbIcon);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WinSCard_SCardGetReaderIconW' -Namespace Win32 -PassThru
# $api::SCardGetReaderIconW(hContext, szReaderName, pbIcon, pcbIcon)

#uselib "WinSCard.dll"
#func global SCardGetReaderIconW "SCardGetReaderIconW" wptr, wptr, wptr, wptr
; SCardGetReaderIconW hContext, szReaderName, varptr(pbIcon), varptr(pcbIcon)   ; 戻り値は stat
; hContext : UINT_PTR -> "wptr"
; szReaderName : LPCWSTR -> "wptr"
; pbIcon : BYTE* out -> "wptr"
; pcbIcon : DWORD* in/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 SCardGetReaderIconW "SCardGetReaderIconW" sptr, wstr, var, var
; res = SCardGetReaderIconW(hContext, szReaderName, pbIcon, pcbIcon)
; hContext : UINT_PTR -> "sptr"
; szReaderName : LPCWSTR -> "wstr"
; pbIcon : BYTE* out -> "var"
; pcbIcon : 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 SCardGetReaderIconW(UINT_PTR hContext, LPCWSTR szReaderName, BYTE* pbIcon, DWORD* pcbIcon)
#uselib "WinSCard.dll"
#cfunc global SCardGetReaderIconW "SCardGetReaderIconW" intptr, wstr, var, var
; res = SCardGetReaderIconW(hContext, szReaderName, pbIcon, pcbIcon)
; hContext : UINT_PTR -> "intptr"
; szReaderName : LPCWSTR -> "wstr"
; pbIcon : BYTE* out -> "var"
; pcbIcon : 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")
	procSCardGetReaderIconW = winscard.NewProc("SCardGetReaderIconW")
)

// hContext (UINT_PTR), szReaderName (LPCWSTR), pbIcon (BYTE* out), pcbIcon (DWORD* in/out)
r1, _, err := procSCardGetReaderIconW.Call(
	uintptr(hContext),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szReaderName))),
	uintptr(pbIcon),
	uintptr(pcbIcon),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SCardGetReaderIconW(
  hContext: NativeUInt;   // UINT_PTR
  szReaderName: PWideChar;   // LPCWSTR
  pbIcon: Pointer;   // BYTE* out
  pcbIcon: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'WinSCard.dll' name 'SCardGetReaderIconW';

result := DllCall("WinSCard\SCardGetReaderIconW"
    , "UPtr", hContext   ; UINT_PTR
    , "WStr", szReaderName   ; LPCWSTR
    , "Ptr", pbIcon   ; BYTE* out
    , "Ptr", pcbIcon   ; DWORD* in/out
    , "Int")   ; return: INT

●SCardGetReaderIconW(hContext, szReaderName, pbIcon, pcbIcon) = DLL("WinSCard.dll", "int SCardGetReaderIconW(int, char*, void*, void*)")
# 呼び出し: SCardGetReaderIconW(hContext, szReaderName, pbIcon, pcbIcon)
# hContext : UINT_PTR -> "int"
# szReaderName : LPCWSTR -> "char*"
# pbIcon : BYTE* out -> "void*"
# pcbIcon : 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。