CoDecodeProxy

// OLE32.dll
#include <windows.h>

HRESULT CoDecodeProxy(
    DWORD dwClientPid,
    ULONGLONG ui64ProxyAddress,
    ServerInformation* pServerInformation
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function CoDecodeProxy(
    dwClientPid As UInteger,   ' DWORD
    ui64ProxyAddress As ULong,   ' ULONGLONG
    pServerInformation As IntPtr   ' ServerInformation* out
) As Integer
End Function

' dwClientPid : DWORD
' ui64ProxyAddress : ULONGLONG
' pServerInformation : ServerInformation* out
Declare PtrSafe Function CoDecodeProxy Lib "ole32" ( _
    ByVal dwClientPid As Long, _
    ByVal ui64ProxyAddress As LongLong, _
    ByVal pServerInformation 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

CoDecodeProxy = ctypes.windll.ole32.CoDecodeProxy
CoDecodeProxy.restype = ctypes.c_int
CoDecodeProxy.argtypes = [
    wintypes.DWORD,  # dwClientPid : DWORD
    ctypes.c_ulonglong,  # ui64ProxyAddress : ULONGLONG
    ctypes.c_void_p,  # pServerInformation : ServerInformation* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
CoDecodeProxy = Fiddle::Function.new(
  lib['CoDecodeProxy'],
  [
    -Fiddle::TYPE_INT,  # dwClientPid : DWORD
    -Fiddle::TYPE_LONG_LONG,  # ui64ProxyAddress : ULONGLONG
    Fiddle::TYPE_VOIDP,  # pServerInformation : ServerInformation* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn CoDecodeProxy(
        dwClientPid: u32,  // DWORD
        ui64ProxyAddress: u64,  // ULONGLONG
        pServerInformation: *mut ServerInformation  // ServerInformation* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern int CoDecodeProxy(uint dwClientPid, ulong ui64ProxyAddress, IntPtr pServerInformation);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_CoDecodeProxy' -Namespace Win32 -PassThru
# $api::CoDecodeProxy(dwClientPid, ui64ProxyAddress, pServerInformation)

#uselib "OLE32.dll"
#func global CoDecodeProxy "CoDecodeProxy" sptr, sptr, sptr
; CoDecodeProxy dwClientPid, ui64ProxyAddress, varptr(pServerInformation)   ; 戻り値は stat
; dwClientPid : DWORD -> "sptr"
; ui64ProxyAddress : ULONGLONG -> "sptr"
; pServerInformation : ServerInformation* 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 "OLE32.dll"
#cfunc global CoDecodeProxy "CoDecodeProxy" int, int64, var
; res = CoDecodeProxy(dwClientPid, ui64ProxyAddress, pServerInformation)
; dwClientPid : DWORD -> "int"
; ui64ProxyAddress : ULONGLONG -> "int64"
; pServerInformation : ServerInformation* 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)。

; HRESULT CoDecodeProxy(DWORD dwClientPid, ULONGLONG ui64ProxyAddress, ServerInformation* pServerInformation)
#uselib "OLE32.dll"
#cfunc global CoDecodeProxy "CoDecodeProxy" int, int64, var
; res = CoDecodeProxy(dwClientPid, ui64ProxyAddress, pServerInformation)
; dwClientPid : DWORD -> "int"
; ui64ProxyAddress : ULONGLONG -> "int64"
; pServerInformation : ServerInformation* 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 (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procCoDecodeProxy = ole32.NewProc("CoDecodeProxy")
)

// dwClientPid (DWORD), ui64ProxyAddress (ULONGLONG), pServerInformation (ServerInformation* out)
r1, _, err := procCoDecodeProxy.Call(
	uintptr(dwClientPid),
	uintptr(ui64ProxyAddress),
	uintptr(pServerInformation),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function CoDecodeProxy(
  dwClientPid: DWORD;   // DWORD
  ui64ProxyAddress: UInt64;   // ULONGLONG
  pServerInformation: Pointer   // ServerInformation* out
): Integer; stdcall;
  external 'OLE32.dll' name 'CoDecodeProxy';

result := DllCall("OLE32\CoDecodeProxy"
    , "UInt", dwClientPid   ; DWORD
    , "Int64", ui64ProxyAddress   ; ULONGLONG
    , "Ptr", pServerInformation   ; ServerInformation* out
    , "Int")   ; return: HRESULT

●CoDecodeProxy(dwClientPid, ui64ProxyAddress, pServerInformation) = DLL("OLE32.dll", "int CoDecodeProxy(dword, qword, void*)")
# 呼び出し: CoDecodeProxy(dwClientPid, ui64ProxyAddress, pServerInformation)
# dwClientPid : DWORD -> "dword"
# ui64ProxyAddress : ULONGLONG -> "qword"
# pServerInformation : ServerInformation* 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)。