ReadUrlCacheEntryStreamEx

// WININET.dll
#include <windows.h>

BOOL ReadUrlCacheEntryStreamEx(
    HANDLE hUrlCacheStream,
    ULONGLONG qwLocation,
    void* lpBuffer,
    DWORD* lpdwLen
);

<DllImport("WININET.dll", ExactSpelling:=True)>
Public Shared Function ReadUrlCacheEntryStreamEx(
    hUrlCacheStream As IntPtr,   ' HANDLE
    qwLocation As ULong,   ' ULONGLONG
    lpBuffer As IntPtr,   ' void* out
    ByRef lpdwLen As UInteger   ' DWORD* in/out
) As Boolean
End Function

' hUrlCacheStream : HANDLE
' qwLocation : ULONGLONG
' lpBuffer : void* out
' lpdwLen : DWORD* in/out
Declare PtrSafe Function ReadUrlCacheEntryStreamEx Lib "wininet" ( _
    ByVal hUrlCacheStream As LongPtr, _
    ByVal qwLocation As LongLong, _
    ByVal lpBuffer As LongPtr, _
    ByRef lpdwLen 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

ReadUrlCacheEntryStreamEx = ctypes.windll.wininet.ReadUrlCacheEntryStreamEx
ReadUrlCacheEntryStreamEx.restype = wintypes.BOOL
ReadUrlCacheEntryStreamEx.argtypes = [
    wintypes.HANDLE,  # hUrlCacheStream : HANDLE
    ctypes.c_ulonglong,  # qwLocation : ULONGLONG
    ctypes.POINTER(None),  # lpBuffer : void* out
    ctypes.POINTER(wintypes.DWORD),  # lpdwLen : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
ReadUrlCacheEntryStreamEx = Fiddle::Function.new(
  lib['ReadUrlCacheEntryStreamEx'],
  [
    Fiddle::TYPE_VOIDP,  # hUrlCacheStream : HANDLE
    -Fiddle::TYPE_LONG_LONG,  # qwLocation : ULONGLONG
    Fiddle::TYPE_VOIDP,  # lpBuffer : void* out
    Fiddle::TYPE_VOIDP,  # lpdwLen : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn ReadUrlCacheEntryStreamEx(
        hUrlCacheStream: *mut core::ffi::c_void,  // HANDLE
        qwLocation: u64,  // ULONGLONG
        lpBuffer: *mut (),  // void* out
        lpdwLen: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WININET.dll")]
public static extern bool ReadUrlCacheEntryStreamEx(IntPtr hUrlCacheStream, ulong qwLocation, IntPtr lpBuffer, ref uint lpdwLen);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_ReadUrlCacheEntryStreamEx' -Namespace Win32 -PassThru
# $api::ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)

#uselib "WININET.dll"
#func global ReadUrlCacheEntryStreamEx "ReadUrlCacheEntryStreamEx" sptr, sptr, sptr, sptr
; ReadUrlCacheEntryStreamEx hUrlCacheStream, qwLocation, lpBuffer, varptr(lpdwLen)   ; 戻り値は stat
; hUrlCacheStream : HANDLE -> "sptr"
; qwLocation : ULONGLONG -> "sptr"
; lpBuffer : void* out -> "sptr"
; lpdwLen : DWORD* in/out -> "sptr"
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※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 ReadUrlCacheEntryStreamEx "ReadUrlCacheEntryStreamEx" sptr, int64, sptr, var
; res = ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)
; hUrlCacheStream : HANDLE -> "sptr"
; qwLocation : ULONGLONG -> "int64"
; lpBuffer : void* out -> "sptr"
; lpdwLen : 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。
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。

; BOOL ReadUrlCacheEntryStreamEx(HANDLE hUrlCacheStream, ULONGLONG qwLocation, void* lpBuffer, DWORD* lpdwLen)
#uselib "WININET.dll"
#cfunc global ReadUrlCacheEntryStreamEx "ReadUrlCacheEntryStreamEx" intptr, int64, intptr, var
; res = ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)
; hUrlCacheStream : HANDLE -> "intptr"
; qwLocation : ULONGLONG -> "int64"
; lpBuffer : void* out -> "intptr"
; lpdwLen : 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 (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procReadUrlCacheEntryStreamEx = wininet.NewProc("ReadUrlCacheEntryStreamEx")
)

// hUrlCacheStream (HANDLE), qwLocation (ULONGLONG), lpBuffer (void* out), lpdwLen (DWORD* in/out)
r1, _, err := procReadUrlCacheEntryStreamEx.Call(
	uintptr(hUrlCacheStream),
	uintptr(qwLocation),
	uintptr(lpBuffer),
	uintptr(lpdwLen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ReadUrlCacheEntryStreamEx(
  hUrlCacheStream: THandle;   // HANDLE
  qwLocation: UInt64;   // ULONGLONG
  lpBuffer: Pointer;   // void* out
  lpdwLen: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'WININET.dll' name 'ReadUrlCacheEntryStreamEx';

result := DllCall("WININET\ReadUrlCacheEntryStreamEx"
    , "Ptr", hUrlCacheStream   ; HANDLE
    , "Int64", qwLocation   ; ULONGLONG
    , "Ptr", lpBuffer   ; void* out
    , "Ptr", lpdwLen   ; DWORD* in/out
    , "Int")   ; return: BOOL

●ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen) = DLL("WININET.dll", "bool ReadUrlCacheEntryStreamEx(void*, qword, void*, void*)")
# 呼び出し: ReadUrlCacheEntryStreamEx(hUrlCacheStream, qwLocation, lpBuffer, lpdwLen)
# hUrlCacheStream : HANDLE -> "void*"
# qwLocation : ULONGLONG -> "qword"
# lpBuffer : void* out -> "void*"
# lpdwLen : 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)。