WinHttpGetProxySettingsEx

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

DWORD WinHttpGetProxySettingsEx(
    void* hResolver,
    WINHTTP_PROXY_SETTINGS_TYPE ProxySettingsType,
    WINHTTP_PROXY_SETTINGS_PARAM* pProxySettingsParam,   // optional
    UINT_PTR pContext   // optional
);

<DllImport("WINHTTP.dll", ExactSpelling:=True)>
Public Shared Function WinHttpGetProxySettingsEx(
    hResolver As IntPtr,   ' void*
    ProxySettingsType As Integer,   ' WINHTTP_PROXY_SETTINGS_TYPE
    pProxySettingsParam As IntPtr,   ' WINHTTP_PROXY_SETTINGS_PARAM* optional
    pContext As UIntPtr   ' UINT_PTR optional
) As UInteger
End Function

' hResolver : void*
' ProxySettingsType : WINHTTP_PROXY_SETTINGS_TYPE
' pProxySettingsParam : WINHTTP_PROXY_SETTINGS_PARAM* optional
' pContext : UINT_PTR optional
Declare PtrSafe Function WinHttpGetProxySettingsEx Lib "winhttp" ( _
    ByVal hResolver As LongPtr, _
    ByVal ProxySettingsType As Long, _
    ByVal pProxySettingsParam As LongPtr, _
    ByVal pContext 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

WinHttpGetProxySettingsEx = ctypes.windll.winhttp.WinHttpGetProxySettingsEx
WinHttpGetProxySettingsEx.restype = wintypes.DWORD
WinHttpGetProxySettingsEx.argtypes = [
    ctypes.POINTER(None),  # hResolver : void*
    ctypes.c_int,  # ProxySettingsType : WINHTTP_PROXY_SETTINGS_TYPE
    ctypes.c_void_p,  # pProxySettingsParam : WINHTTP_PROXY_SETTINGS_PARAM* optional
    ctypes.c_size_t,  # pContext : UINT_PTR optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WINHTTP.dll')
WinHttpGetProxySettingsEx = Fiddle::Function.new(
  lib['WinHttpGetProxySettingsEx'],
  [
    Fiddle::TYPE_VOIDP,  # hResolver : void*
    Fiddle::TYPE_INT,  # ProxySettingsType : WINHTTP_PROXY_SETTINGS_TYPE
    Fiddle::TYPE_VOIDP,  # pProxySettingsParam : WINHTTP_PROXY_SETTINGS_PARAM* optional
    Fiddle::TYPE_UINTPTR_T,  # pContext : UINT_PTR optional
  ],
  -Fiddle::TYPE_INT)

#[link(name = "winhttp")]
extern "system" {
    fn WinHttpGetProxySettingsEx(
        hResolver: *mut (),  // void*
        ProxySettingsType: i32,  // WINHTTP_PROXY_SETTINGS_TYPE
        pProxySettingsParam: *mut WINHTTP_PROXY_SETTINGS_PARAM,  // WINHTTP_PROXY_SETTINGS_PARAM* optional
        pContext: usize  // UINT_PTR optional
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WINHTTP.dll")]
public static extern uint WinHttpGetProxySettingsEx(IntPtr hResolver, int ProxySettingsType, IntPtr pProxySettingsParam, UIntPtr pContext);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WINHTTP_WinHttpGetProxySettingsEx' -Namespace Win32 -PassThru
# $api::WinHttpGetProxySettingsEx(hResolver, ProxySettingsType, pProxySettingsParam, pContext)

#uselib "WINHTTP.dll"
#func global WinHttpGetProxySettingsEx "WinHttpGetProxySettingsEx" sptr, sptr, sptr, sptr
; WinHttpGetProxySettingsEx hResolver, ProxySettingsType, varptr(pProxySettingsParam), pContext   ; 戻り値は stat
; hResolver : void* -> "sptr"
; ProxySettingsType : WINHTTP_PROXY_SETTINGS_TYPE -> "sptr"
; pProxySettingsParam : WINHTTP_PROXY_SETTINGS_PARAM* optional -> "sptr"
; pContext : UINT_PTR 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 "WINHTTP.dll"
#cfunc global WinHttpGetProxySettingsEx "WinHttpGetProxySettingsEx" sptr, int, var, sptr
; res = WinHttpGetProxySettingsEx(hResolver, ProxySettingsType, pProxySettingsParam, pContext)
; hResolver : void* -> "sptr"
; ProxySettingsType : WINHTTP_PROXY_SETTINGS_TYPE -> "int"
; pProxySettingsParam : WINHTTP_PROXY_SETTINGS_PARAM* optional -> "var"
; pContext : UINT_PTR optional -> "sptr"
; ※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 WinHttpGetProxySettingsEx(void* hResolver, WINHTTP_PROXY_SETTINGS_TYPE ProxySettingsType, WINHTTP_PROXY_SETTINGS_PARAM* pProxySettingsParam, UINT_PTR pContext)
#uselib "WINHTTP.dll"
#cfunc global WinHttpGetProxySettingsEx "WinHttpGetProxySettingsEx" intptr, int, var, intptr
; res = WinHttpGetProxySettingsEx(hResolver, ProxySettingsType, pProxySettingsParam, pContext)
; hResolver : void* -> "intptr"
; ProxySettingsType : WINHTTP_PROXY_SETTINGS_TYPE -> "int"
; pProxySettingsParam : WINHTTP_PROXY_SETTINGS_PARAM* optional -> "var"
; pContext : UINT_PTR optional -> "intptr"
; ※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 (
	winhttp = windows.NewLazySystemDLL("WINHTTP.dll")
	procWinHttpGetProxySettingsEx = winhttp.NewProc("WinHttpGetProxySettingsEx")
)

// hResolver (void*), ProxySettingsType (WINHTTP_PROXY_SETTINGS_TYPE), pProxySettingsParam (WINHTTP_PROXY_SETTINGS_PARAM* optional), pContext (UINT_PTR optional)
r1, _, err := procWinHttpGetProxySettingsEx.Call(
	uintptr(hResolver),
	uintptr(ProxySettingsType),
	uintptr(pProxySettingsParam),
	uintptr(pContext),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function WinHttpGetProxySettingsEx(
  hResolver: Pointer;   // void*
  ProxySettingsType: Integer;   // WINHTTP_PROXY_SETTINGS_TYPE
  pProxySettingsParam: Pointer;   // WINHTTP_PROXY_SETTINGS_PARAM* optional
  pContext: NativeUInt   // UINT_PTR optional
): DWORD; stdcall;
  external 'WINHTTP.dll' name 'WinHttpGetProxySettingsEx';

result := DllCall("WINHTTP\WinHttpGetProxySettingsEx"
    , "Ptr", hResolver   ; void*
    , "Int", ProxySettingsType   ; WINHTTP_PROXY_SETTINGS_TYPE
    , "Ptr", pProxySettingsParam   ; WINHTTP_PROXY_SETTINGS_PARAM* optional
    , "UPtr", pContext   ; UINT_PTR optional
    , "UInt")   ; return: DWORD

●WinHttpGetProxySettingsEx(hResolver, ProxySettingsType, pProxySettingsParam, pContext) = DLL("WINHTTP.dll", "dword WinHttpGetProxySettingsEx(void*, int, void*, int)")
# 呼び出し: WinHttpGetProxySettingsEx(hResolver, ProxySettingsType, pProxySettingsParam, pContext)
# hResolver : void* -> "void*"
# ProxySettingsType : WINHTTP_PROXY_SETTINGS_TYPE -> "int"
# pProxySettingsParam : WINHTTP_PROXY_SETTINGS_PARAM* optional -> "void*"
# pContext : UINT_PTR optional -> "int"
# 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)。