AppCacheGetFallbackUrl

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

DWORD AppCacheGetFallbackUrl(
    void* hAppCache,
    LPCWSTR pwszUrl,
    LPWSTR* ppwszFallbackUrl
);

<DllImport("WININET.dll", ExactSpelling:=True)>
Public Shared Function AppCacheGetFallbackUrl(
    hAppCache As IntPtr,   ' void*
    <MarshalAs(UnmanagedType.LPWStr)> pwszUrl As String,   ' LPCWSTR
    ppwszFallbackUrl As IntPtr   ' LPWSTR* out
) As UInteger
End Function

' hAppCache : void*
' pwszUrl : LPCWSTR
' ppwszFallbackUrl : LPWSTR* out
Declare PtrSafe Function AppCacheGetFallbackUrl Lib "wininet" ( _
    ByVal hAppCache As LongPtr, _
    ByVal pwszUrl As LongPtr, _
    ByVal ppwszFallbackUrl As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

AppCacheGetFallbackUrl = ctypes.windll.wininet.AppCacheGetFallbackUrl
AppCacheGetFallbackUrl.restype = wintypes.DWORD
AppCacheGetFallbackUrl.argtypes = [
    ctypes.POINTER(None),  # hAppCache : void*
    wintypes.LPCWSTR,  # pwszUrl : LPCWSTR
    ctypes.c_void_p,  # ppwszFallbackUrl : LPWSTR* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
AppCacheGetFallbackUrl = Fiddle::Function.new(
  lib['AppCacheGetFallbackUrl'],
  [
    Fiddle::TYPE_VOIDP,  # hAppCache : void*
    Fiddle::TYPE_VOIDP,  # pwszUrl : LPCWSTR
    Fiddle::TYPE_VOIDP,  # ppwszFallbackUrl : LPWSTR* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn AppCacheGetFallbackUrl(
        hAppCache: *mut (),  // void*
        pwszUrl: *const u16,  // LPCWSTR
        ppwszFallbackUrl: *mut *mut u16  // LPWSTR* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WININET.dll")]
public static extern uint AppCacheGetFallbackUrl(IntPtr hAppCache, [MarshalAs(UnmanagedType.LPWStr)] string pwszUrl, IntPtr ppwszFallbackUrl);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_AppCacheGetFallbackUrl' -Namespace Win32 -PassThru
# $api::AppCacheGetFallbackUrl(hAppCache, pwszUrl, ppwszFallbackUrl)

#uselib "WININET.dll"
#func global AppCacheGetFallbackUrl "AppCacheGetFallbackUrl" sptr, sptr, sptr
; AppCacheGetFallbackUrl hAppCache, pwszUrl, varptr(ppwszFallbackUrl)   ; 戻り値は stat
; hAppCache : void* -> "sptr"
; pwszUrl : LPCWSTR -> "sptr"
; ppwszFallbackUrl : LPWSTR* out -> "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 AppCacheGetFallbackUrl "AppCacheGetFallbackUrl" sptr, wstr, var
; res = AppCacheGetFallbackUrl(hAppCache, pwszUrl, ppwszFallbackUrl)
; hAppCache : void* -> "sptr"
; pwszUrl : LPCWSTR -> "wstr"
; ppwszFallbackUrl : LPWSTR* 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。

; DWORD AppCacheGetFallbackUrl(void* hAppCache, LPCWSTR pwszUrl, LPWSTR* ppwszFallbackUrl)
#uselib "WININET.dll"
#cfunc global AppCacheGetFallbackUrl "AppCacheGetFallbackUrl" intptr, wstr, var
; res = AppCacheGetFallbackUrl(hAppCache, pwszUrl, ppwszFallbackUrl)
; hAppCache : void* -> "intptr"
; pwszUrl : LPCWSTR -> "wstr"
; ppwszFallbackUrl : LPWSTR* 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")
	procAppCacheGetFallbackUrl = wininet.NewProc("AppCacheGetFallbackUrl")
)

// hAppCache (void*), pwszUrl (LPCWSTR), ppwszFallbackUrl (LPWSTR* out)
r1, _, err := procAppCacheGetFallbackUrl.Call(
	uintptr(hAppCache),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszUrl))),
	uintptr(ppwszFallbackUrl),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function AppCacheGetFallbackUrl(
  hAppCache: Pointer;   // void*
  pwszUrl: PWideChar;   // LPCWSTR
  ppwszFallbackUrl: PPWideChar   // LPWSTR* out
): DWORD; stdcall;
  external 'WININET.dll' name 'AppCacheGetFallbackUrl';

result := DllCall("WININET\AppCacheGetFallbackUrl"
    , "Ptr", hAppCache   ; void*
    , "WStr", pwszUrl   ; LPCWSTR
    , "Ptr", ppwszFallbackUrl   ; LPWSTR* out
    , "UInt")   ; return: DWORD

●AppCacheGetFallbackUrl(hAppCache, pwszUrl, ppwszFallbackUrl) = DLL("WININET.dll", "dword AppCacheGetFallbackUrl(void*, char*, void*)")
# 呼び出し: AppCacheGetFallbackUrl(hAppCache, pwszUrl, ppwszFallbackUrl)
# hAppCache : void* -> "void*"
# pwszUrl : LPCWSTR -> "char*"
# ppwszFallbackUrl : LPWSTR* 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)。