FreeUrlCacheSpaceW

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

BOOL FreeUrlCacheSpaceW(
    LPCWSTR lpszCachePath,   // optional
    DWORD dwSize,
    DWORD dwFilter
);

<DllImport("WININET.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FreeUrlCacheSpaceW(
    <MarshalAs(UnmanagedType.LPWStr)> lpszCachePath As String,   ' LPCWSTR optional
    dwSize As UInteger,   ' DWORD
    dwFilter As UInteger   ' DWORD
) As Boolean
End Function

' lpszCachePath : LPCWSTR optional
' dwSize : DWORD
' dwFilter : DWORD
Declare PtrSafe Function FreeUrlCacheSpaceW Lib "wininet" ( _
    ByVal lpszCachePath As LongPtr, _
    ByVal dwSize As Long, _
    ByVal dwFilter 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

FreeUrlCacheSpaceW = ctypes.windll.wininet.FreeUrlCacheSpaceW
FreeUrlCacheSpaceW.restype = wintypes.BOOL
FreeUrlCacheSpaceW.argtypes = [
    wintypes.LPCWSTR,  # lpszCachePath : LPCWSTR optional
    wintypes.DWORD,  # dwSize : DWORD
    wintypes.DWORD,  # dwFilter : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
FreeUrlCacheSpaceW = Fiddle::Function.new(
  lib['FreeUrlCacheSpaceW'],
  [
    Fiddle::TYPE_VOIDP,  # lpszCachePath : LPCWSTR optional
    -Fiddle::TYPE_INT,  # dwSize : DWORD
    -Fiddle::TYPE_INT,  # dwFilter : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "wininet")]
extern "system" {
    fn FreeUrlCacheSpaceW(
        lpszCachePath: *const u16,  // LPCWSTR optional
        dwSize: u32,  // DWORD
        dwFilter: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WININET.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool FreeUrlCacheSpaceW([MarshalAs(UnmanagedType.LPWStr)] string lpszCachePath, uint dwSize, uint dwFilter);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_FreeUrlCacheSpaceW' -Namespace Win32 -PassThru
# $api::FreeUrlCacheSpaceW(lpszCachePath, dwSize, dwFilter)

#uselib "WININET.dll"
#func global FreeUrlCacheSpaceW "FreeUrlCacheSpaceW" wptr, wptr, wptr
; FreeUrlCacheSpaceW lpszCachePath, dwSize, dwFilter   ; 戻り値は stat
; lpszCachePath : LPCWSTR optional -> "wptr"
; dwSize : DWORD -> "wptr"
; dwFilter : 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 "WININET.dll"
#cfunc global FreeUrlCacheSpaceW "FreeUrlCacheSpaceW" wstr, int, int
; res = FreeUrlCacheSpaceW(lpszCachePath, dwSize, dwFilter)
; lpszCachePath : LPCWSTR optional -> "wstr"
; dwSize : DWORD -> "int"
; dwFilter : DWORD -> "int"

; BOOL FreeUrlCacheSpaceW(LPCWSTR lpszCachePath, DWORD dwSize, DWORD dwFilter)
#uselib "WININET.dll"
#cfunc global FreeUrlCacheSpaceW "FreeUrlCacheSpaceW" wstr, int, int
; res = FreeUrlCacheSpaceW(lpszCachePath, dwSize, dwFilter)
; lpszCachePath : LPCWSTR optional -> "wstr"
; dwSize : DWORD -> "int"
; dwFilter : DWORD -> "int"

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

var (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procFreeUrlCacheSpaceW = wininet.NewProc("FreeUrlCacheSpaceW")
)

// lpszCachePath (LPCWSTR optional), dwSize (DWORD), dwFilter (DWORD)
r1, _, err := procFreeUrlCacheSpaceW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszCachePath))),
	uintptr(dwSize),
	uintptr(dwFilter),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function FreeUrlCacheSpaceW(
  lpszCachePath: PWideChar;   // LPCWSTR optional
  dwSize: DWORD;   // DWORD
  dwFilter: DWORD   // DWORD
): BOOL; stdcall;
  external 'WININET.dll' name 'FreeUrlCacheSpaceW';

result := DllCall("WININET\FreeUrlCacheSpaceW"
    , "WStr", lpszCachePath   ; LPCWSTR optional
    , "UInt", dwSize   ; DWORD
    , "UInt", dwFilter   ; DWORD
    , "Int")   ; return: BOOL

●FreeUrlCacheSpaceW(lpszCachePath, dwSize, dwFilter) = DLL("WININET.dll", "bool FreeUrlCacheSpaceW(char*, dword, dword)")
# 呼び出し: FreeUrlCacheSpaceW(lpszCachePath, dwSize, dwFilter)
# lpszCachePath : LPCWSTR optional -> "char*"
# dwSize : DWORD -> "dword"
# dwFilter : 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。