SHQueryRecycleBinW

// SHELL32.dll  (Unicode / -W)
#include <windows.h>

HRESULT SHQueryRecycleBinW(
    LPCWSTR pszRootPath,   // optional
    SHQUERYRBINFO* pSHQueryRBInfo
);

<DllImport("SHELL32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function SHQueryRecycleBinW(
    <MarshalAs(UnmanagedType.LPWStr)> pszRootPath As String,   ' LPCWSTR optional
    pSHQueryRBInfo As IntPtr   ' SHQUERYRBINFO* in/out
) As Integer
End Function

' pszRootPath : LPCWSTR optional
' pSHQueryRBInfo : SHQUERYRBINFO* in/out
Declare PtrSafe Function SHQueryRecycleBinW Lib "shell32" ( _
    ByVal pszRootPath As LongPtr, _
    ByVal pSHQueryRBInfo As LongPtr) 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

SHQueryRecycleBinW = ctypes.windll.shell32.SHQueryRecycleBinW
SHQueryRecycleBinW.restype = ctypes.c_int
SHQueryRecycleBinW.argtypes = [
    wintypes.LPCWSTR,  # pszRootPath : LPCWSTR optional
    ctypes.c_void_p,  # pSHQueryRBInfo : SHQUERYRBINFO* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
SHQueryRecycleBinW = Fiddle::Function.new(
  lib['SHQueryRecycleBinW'],
  [
    Fiddle::TYPE_VOIDP,  # pszRootPath : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pSHQueryRBInfo : SHQUERYRBINFO* in/out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shell32")]
extern "system" {
    fn SHQueryRecycleBinW(
        pszRootPath: *const u16,  // LPCWSTR optional
        pSHQueryRBInfo: *mut SHQUERYRBINFO  // SHQUERYRBINFO* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHELL32.dll", CharSet = CharSet.Unicode)]
public static extern int SHQueryRecycleBinW([MarshalAs(UnmanagedType.LPWStr)] string pszRootPath, IntPtr pSHQueryRBInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_SHQueryRecycleBinW' -Namespace Win32 -PassThru
# $api::SHQueryRecycleBinW(pszRootPath, pSHQueryRBInfo)

#uselib "SHELL32.dll"
#func global SHQueryRecycleBinW "SHQueryRecycleBinW" wptr, wptr
; SHQueryRecycleBinW pszRootPath, varptr(pSHQueryRBInfo)   ; 戻り値は stat
; pszRootPath : LPCWSTR optional -> "wptr"
; pSHQueryRBInfo : SHQUERYRBINFO* 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 "SHELL32.dll"
#cfunc global SHQueryRecycleBinW "SHQueryRecycleBinW" wstr, var
; res = SHQueryRecycleBinW(pszRootPath, pSHQueryRBInfo)
; pszRootPath : LPCWSTR optional -> "wstr"
; pSHQueryRBInfo : SHQUERYRBINFO* 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。

; HRESULT SHQueryRecycleBinW(LPCWSTR pszRootPath, SHQUERYRBINFO* pSHQueryRBInfo)
#uselib "SHELL32.dll"
#cfunc global SHQueryRecycleBinW "SHQueryRecycleBinW" wstr, var
; res = SHQueryRecycleBinW(pszRootPath, pSHQueryRBInfo)
; pszRootPath : LPCWSTR optional -> "wstr"
; pSHQueryRBInfo : SHQUERYRBINFO* 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 (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procSHQueryRecycleBinW = shell32.NewProc("SHQueryRecycleBinW")
)

// pszRootPath (LPCWSTR optional), pSHQueryRBInfo (SHQUERYRBINFO* in/out)
r1, _, err := procSHQueryRecycleBinW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszRootPath))),
	uintptr(pSHQueryRBInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function SHQueryRecycleBinW(
  pszRootPath: PWideChar;   // LPCWSTR optional
  pSHQueryRBInfo: Pointer   // SHQUERYRBINFO* in/out
): Integer; stdcall;
  external 'SHELL32.dll' name 'SHQueryRecycleBinW';

result := DllCall("SHELL32\SHQueryRecycleBinW"
    , "WStr", pszRootPath   ; LPCWSTR optional
    , "Ptr", pSHQueryRBInfo   ; SHQUERYRBINFO* in/out
    , "Int")   ; return: HRESULT

●SHQueryRecycleBinW(pszRootPath, pSHQueryRBInfo) = DLL("SHELL32.dll", "int SHQueryRecycleBinW(char*, void*)")
# 呼び出し: SHQueryRecycleBinW(pszRootPath, pSHQueryRBInfo)
# pszRootPath : LPCWSTR optional -> "char*"
# pSHQueryRBInfo : SHQUERYRBINFO* 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。