RegisterHelper

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

DWORD RegisterHelper(
    const GUID* pguidParentContext,
    const NS_HELPER_ATTRIBUTES* pfnRegisterSubContext
);

<DllImport("NETSH.dll", ExactSpelling:=True)>
Public Shared Function RegisterHelper(
    ByRef pguidParentContext As Guid,   ' GUID*
    pfnRegisterSubContext As IntPtr   ' NS_HELPER_ATTRIBUTES*
) As UInteger
End Function

' pguidParentContext : GUID*
' pfnRegisterSubContext : NS_HELPER_ATTRIBUTES*
Declare PtrSafe Function RegisterHelper Lib "netsh" ( _
    ByVal pguidParentContext As LongPtr, _
    ByVal pfnRegisterSubContext 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

RegisterHelper = ctypes.windll.netsh.RegisterHelper
RegisterHelper.restype = wintypes.DWORD
RegisterHelper.argtypes = [
    ctypes.c_void_p,  # pguidParentContext : GUID*
    ctypes.c_void_p,  # pfnRegisterSubContext : NS_HELPER_ATTRIBUTES*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('NETSH.dll')
RegisterHelper = Fiddle::Function.new(
  lib['RegisterHelper'],
  [
    Fiddle::TYPE_VOIDP,  # pguidParentContext : GUID*
    Fiddle::TYPE_VOIDP,  # pfnRegisterSubContext : NS_HELPER_ATTRIBUTES*
  ],
  -Fiddle::TYPE_INT)

#[link(name = "netsh")]
extern "system" {
    fn RegisterHelper(
        pguidParentContext: *const GUID,  // GUID*
        pfnRegisterSubContext: *const NS_HELPER_ATTRIBUTES  // NS_HELPER_ATTRIBUTES*
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("NETSH.dll")]
public static extern uint RegisterHelper(ref Guid pguidParentContext, IntPtr pfnRegisterSubContext);
"@
$api = Add-Type -MemberDefinition $sig -Name 'NETSH_RegisterHelper' -Namespace Win32 -PassThru
# $api::RegisterHelper(pguidParentContext, pfnRegisterSubContext)

#uselib "NETSH.dll"
#func global RegisterHelper "RegisterHelper" sptr, sptr
; RegisterHelper varptr(pguidParentContext), varptr(pfnRegisterSubContext)   ; 戻り値は stat
; pguidParentContext : GUID* -> "sptr"
; pfnRegisterSubContext : NS_HELPER_ATTRIBUTES* -> "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 "NETSH.dll"
#cfunc global RegisterHelper "RegisterHelper" var, var
; res = RegisterHelper(pguidParentContext, pfnRegisterSubContext)
; pguidParentContext : GUID* -> "var"
; pfnRegisterSubContext : NS_HELPER_ATTRIBUTES* -> "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 RegisterHelper(GUID* pguidParentContext, NS_HELPER_ATTRIBUTES* pfnRegisterSubContext)
#uselib "NETSH.dll"
#cfunc global RegisterHelper "RegisterHelper" var, var
; res = RegisterHelper(pguidParentContext, pfnRegisterSubContext)
; pguidParentContext : GUID* -> "var"
; pfnRegisterSubContext : NS_HELPER_ATTRIBUTES* -> "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 (
	netsh = windows.NewLazySystemDLL("NETSH.dll")
	procRegisterHelper = netsh.NewProc("RegisterHelper")
)

// pguidParentContext (GUID*), pfnRegisterSubContext (NS_HELPER_ATTRIBUTES*)
r1, _, err := procRegisterHelper.Call(
	uintptr(pguidParentContext),
	uintptr(pfnRegisterSubContext),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function RegisterHelper(
  pguidParentContext: PGUID;   // GUID*
  pfnRegisterSubContext: Pointer   // NS_HELPER_ATTRIBUTES*
): DWORD; stdcall;
  external 'NETSH.dll' name 'RegisterHelper';

result := DllCall("NETSH\RegisterHelper"
    , "Ptr", pguidParentContext   ; GUID*
    , "Ptr", pfnRegisterSubContext   ; NS_HELPER_ATTRIBUTES*
    , "UInt")   ; return: DWORD

●RegisterHelper(pguidParentContext, pfnRegisterSubContext) = DLL("NETSH.dll", "dword RegisterHelper(void*, void*)")
# 呼び出し: RegisterHelper(pguidParentContext, pfnRegisterSubContext)
# pguidParentContext : GUID* -> "void*"
# pfnRegisterSubContext : NS_HELPER_ATTRIBUTES* -> "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)。