SHEmptyRecycleBinA

// SHELL32.dll  (ANSI / -A)
#include <windows.h>

HRESULT SHEmptyRecycleBinA(
    HWND hwnd,   // optional
    LPCSTR pszRootPath,   // optional
    DWORD dwFlags
);

<DllImport("SHELL32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SHEmptyRecycleBinA(
    hwnd As IntPtr,   ' HWND optional
    <MarshalAs(UnmanagedType.LPStr)> pszRootPath As String,   ' LPCSTR optional
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' hwnd : HWND optional
' pszRootPath : LPCSTR optional
' dwFlags : DWORD
Declare PtrSafe Function SHEmptyRecycleBinA Lib "shell32" ( _
    ByVal hwnd As LongPtr, _
    ByVal pszRootPath As String, _
    ByVal dwFlags 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

SHEmptyRecycleBinA = ctypes.windll.shell32.SHEmptyRecycleBinA
SHEmptyRecycleBinA.restype = ctypes.c_int
SHEmptyRecycleBinA.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND optional
    wintypes.LPCSTR,  # pszRootPath : LPCSTR optional
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
SHEmptyRecycleBinA = Fiddle::Function.new(
  lib['SHEmptyRecycleBinA'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND optional
    Fiddle::TYPE_VOIDP,  # pszRootPath : LPCSTR optional
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "shell32")]
extern "system" {
    fn SHEmptyRecycleBinA(
        hwnd: *mut core::ffi::c_void,  // HWND optional
        pszRootPath: *const u8,  // LPCSTR optional
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHELL32.dll", CharSet = CharSet.Ansi)]
public static extern int SHEmptyRecycleBinA(IntPtr hwnd, [MarshalAs(UnmanagedType.LPStr)] string pszRootPath, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_SHEmptyRecycleBinA' -Namespace Win32 -PassThru
# $api::SHEmptyRecycleBinA(hwnd, pszRootPath, dwFlags)

#uselib "SHELL32.dll"
#func global SHEmptyRecycleBinA "SHEmptyRecycleBinA" sptr, sptr, sptr
; SHEmptyRecycleBinA hwnd, pszRootPath, dwFlags   ; 戻り値は stat
; hwnd : HWND optional -> "sptr"
; pszRootPath : LPCSTR optional -> "sptr"
; dwFlags : DWORD -> "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 "SHELL32.dll"
#cfunc global SHEmptyRecycleBinA "SHEmptyRecycleBinA" sptr, str, int
; res = SHEmptyRecycleBinA(hwnd, pszRootPath, dwFlags)
; hwnd : HWND optional -> "sptr"
; pszRootPath : LPCSTR optional -> "str"
; dwFlags : DWORD -> "int"

; HRESULT SHEmptyRecycleBinA(HWND hwnd, LPCSTR pszRootPath, DWORD dwFlags)
#uselib "SHELL32.dll"
#cfunc global SHEmptyRecycleBinA "SHEmptyRecycleBinA" intptr, str, int
; res = SHEmptyRecycleBinA(hwnd, pszRootPath, dwFlags)
; hwnd : HWND optional -> "intptr"
; pszRootPath : LPCSTR optional -> "str"
; dwFlags : DWORD -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procSHEmptyRecycleBinA = shell32.NewProc("SHEmptyRecycleBinA")
)

// hwnd (HWND optional), pszRootPath (LPCSTR optional), dwFlags (DWORD)
r1, _, err := procSHEmptyRecycleBinA.Call(
	uintptr(hwnd),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszRootPath))),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function SHEmptyRecycleBinA(
  hwnd: THandle;   // HWND optional
  pszRootPath: PAnsiChar;   // LPCSTR optional
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'SHELL32.dll' name 'SHEmptyRecycleBinA';

result := DllCall("SHELL32\SHEmptyRecycleBinA"
    , "Ptr", hwnd   ; HWND optional
    , "AStr", pszRootPath   ; LPCSTR optional
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: HRESULT

●SHEmptyRecycleBinA(hwnd, pszRootPath, dwFlags) = DLL("SHELL32.dll", "int SHEmptyRecycleBinA(void*, char*, dword)")
# 呼び出し: SHEmptyRecycleBinA(hwnd, pszRootPath, dwFlags)
# hwnd : HWND optional -> "void*"
# pszRootPath : LPCSTR optional -> "char*"
# dwFlags : 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)。