ReadUrlCacheEntryStream

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

BOOL ReadUrlCacheEntryStream(
    HANDLE hUrlCacheStream,
    DWORD dwLocation,
    void* lpBuffer,
    DWORD* lpdwLen,
    DWORD Reserved   // optional
);

<DllImport("WININET.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function ReadUrlCacheEntryStream(
    hUrlCacheStream As IntPtr,   ' HANDLE
    dwLocation As UInteger,   ' DWORD
    lpBuffer As IntPtr,   ' void* out
    ByRef lpdwLen As UInteger,   ' DWORD* in/out
    Reserved As UInteger   ' DWORD optional
) As Boolean
End Function

' hUrlCacheStream : HANDLE
' dwLocation : DWORD
' lpBuffer : void* out
' lpdwLen : DWORD* in/out
' Reserved : DWORD optional
Declare PtrSafe Function ReadUrlCacheEntryStream Lib "wininet" ( _
    ByVal hUrlCacheStream As LongPtr, _
    ByVal dwLocation As Long, _
    ByVal lpBuffer As LongPtr, _
    ByRef lpdwLen As Long, _
    ByVal Reserved 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

ReadUrlCacheEntryStream = ctypes.windll.wininet.ReadUrlCacheEntryStream
ReadUrlCacheEntryStream.restype = wintypes.BOOL
ReadUrlCacheEntryStream.argtypes = [
    wintypes.HANDLE,  # hUrlCacheStream : HANDLE
    wintypes.DWORD,  # dwLocation : DWORD
    ctypes.POINTER(None),  # lpBuffer : void* out
    ctypes.POINTER(wintypes.DWORD),  # lpdwLen : DWORD* in/out
    wintypes.DWORD,  # Reserved : DWORD optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
ReadUrlCacheEntryStream = Fiddle::Function.new(
  lib['ReadUrlCacheEntryStream'],
  [
    Fiddle::TYPE_VOIDP,  # hUrlCacheStream : HANDLE
    -Fiddle::TYPE_INT,  # dwLocation : DWORD
    Fiddle::TYPE_VOIDP,  # lpBuffer : void* out
    Fiddle::TYPE_VOIDP,  # lpdwLen : DWORD* in/out
    -Fiddle::TYPE_INT,  # Reserved : DWORD optional
  ],
  Fiddle::TYPE_INT)

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

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

#uselib "WININET.dll"
#func global ReadUrlCacheEntryStream "ReadUrlCacheEntryStream" sptr, sptr, sptr, sptr, sptr
; ReadUrlCacheEntryStream hUrlCacheStream, dwLocation, lpBuffer, varptr(lpdwLen), Reserved   ; 戻り値は stat
; hUrlCacheStream : HANDLE -> "sptr"
; dwLocation : DWORD -> "sptr"
; lpBuffer : void* out -> "sptr"
; lpdwLen : DWORD* in/out -> "sptr"
; Reserved : DWORD optional -> "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 "WININET.dll"
#cfunc global ReadUrlCacheEntryStream "ReadUrlCacheEntryStream" sptr, int, sptr, var, int
; res = ReadUrlCacheEntryStream(hUrlCacheStream, dwLocation, lpBuffer, lpdwLen, Reserved)
; hUrlCacheStream : HANDLE -> "sptr"
; dwLocation : DWORD -> "int"
; lpBuffer : void* out -> "sptr"
; lpdwLen : DWORD* in/out -> "var"
; Reserved : DWORD optional -> "int"
; ※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。

; BOOL ReadUrlCacheEntryStream(HANDLE hUrlCacheStream, DWORD dwLocation, void* lpBuffer, DWORD* lpdwLen, DWORD Reserved)
#uselib "WININET.dll"
#cfunc global ReadUrlCacheEntryStream "ReadUrlCacheEntryStream" intptr, int, intptr, var, int
; res = ReadUrlCacheEntryStream(hUrlCacheStream, dwLocation, lpBuffer, lpdwLen, Reserved)
; hUrlCacheStream : HANDLE -> "intptr"
; dwLocation : DWORD -> "int"
; lpBuffer : void* out -> "intptr"
; lpdwLen : DWORD* in/out -> "var"
; Reserved : DWORD optional -> "int"
; ※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")
	procReadUrlCacheEntryStream = wininet.NewProc("ReadUrlCacheEntryStream")
)

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

function ReadUrlCacheEntryStream(
  hUrlCacheStream: THandle;   // HANDLE
  dwLocation: DWORD;   // DWORD
  lpBuffer: Pointer;   // void* out
  lpdwLen: Pointer;   // DWORD* in/out
  Reserved: DWORD   // DWORD optional
): BOOL; stdcall;
  external 'WININET.dll' name 'ReadUrlCacheEntryStream';

result := DllCall("WININET\ReadUrlCacheEntryStream"
    , "Ptr", hUrlCacheStream   ; HANDLE
    , "UInt", dwLocation   ; DWORD
    , "Ptr", lpBuffer   ; void* out
    , "Ptr", lpdwLen   ; DWORD* in/out
    , "UInt", Reserved   ; DWORD optional
    , "Int")   ; return: BOOL

●ReadUrlCacheEntryStream(hUrlCacheStream, dwLocation, lpBuffer, lpdwLen, Reserved) = DLL("WININET.dll", "bool ReadUrlCacheEntryStream(void*, dword, void*, void*, dword)")
# 呼び出し: ReadUrlCacheEntryStream(hUrlCacheStream, dwLocation, lpBuffer, lpdwLen, Reserved)
# hUrlCacheStream : HANDLE -> "void*"
# dwLocation : DWORD -> "dword"
# lpBuffer : void* out -> "void*"
# lpdwLen : DWORD* in/out -> "void*"
# Reserved : DWORD optional -> "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)。