HttpFilterProc

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

DWORD HttpFilterProc(
    HTTP_FILTER_CONTEXT* pfc,
    DWORD NotificationType,
    void* pvNotification
);

<DllImport("RpcProxy.dll", ExactSpelling:=True)>
Public Shared Function HttpFilterProc(
    pfc As IntPtr,   ' HTTP_FILTER_CONTEXT* in/out
    NotificationType As UInteger,   ' DWORD
    pvNotification As IntPtr   ' void* in/out
) As UInteger
End Function

' pfc : HTTP_FILTER_CONTEXT* in/out
' NotificationType : DWORD
' pvNotification : void* in/out
Declare PtrSafe Function HttpFilterProc Lib "rpcproxy" ( _
    ByVal pfc As LongPtr, _
    ByVal NotificationType As Long, _
    ByVal pvNotification 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

HttpFilterProc = ctypes.windll.rpcproxy.HttpFilterProc
HttpFilterProc.restype = wintypes.DWORD
HttpFilterProc.argtypes = [
    ctypes.c_void_p,  # pfc : HTTP_FILTER_CONTEXT* in/out
    wintypes.DWORD,  # NotificationType : DWORD
    ctypes.POINTER(None),  # pvNotification : void* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('RpcProxy.dll')
HttpFilterProc = Fiddle::Function.new(
  lib['HttpFilterProc'],
  [
    Fiddle::TYPE_VOIDP,  # pfc : HTTP_FILTER_CONTEXT* in/out
    -Fiddle::TYPE_INT,  # NotificationType : DWORD
    Fiddle::TYPE_VOIDP,  # pvNotification : void* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "rpcproxy")]
extern "system" {
    fn HttpFilterProc(
        pfc: *mut HTTP_FILTER_CONTEXT,  // HTTP_FILTER_CONTEXT* in/out
        NotificationType: u32,  // DWORD
        pvNotification: *mut ()  // void* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("RpcProxy.dll")]
public static extern uint HttpFilterProc(IntPtr pfc, uint NotificationType, IntPtr pvNotification);
"@
$api = Add-Type -MemberDefinition $sig -Name 'RpcProxy_HttpFilterProc' -Namespace Win32 -PassThru
# $api::HttpFilterProc(pfc, NotificationType, pvNotification)

#uselib "RpcProxy.dll"
#func global HttpFilterProc "HttpFilterProc" sptr, sptr, sptr
; HttpFilterProc varptr(pfc), NotificationType, pvNotification   ; 戻り値は stat
; pfc : HTTP_FILTER_CONTEXT* in/out -> "sptr"
; NotificationType : DWORD -> "sptr"
; pvNotification : void* in/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 "RpcProxy.dll"
#cfunc global HttpFilterProc "HttpFilterProc" var, int, sptr
; res = HttpFilterProc(pfc, NotificationType, pvNotification)
; pfc : HTTP_FILTER_CONTEXT* in/out -> "var"
; NotificationType : DWORD -> "int"
; pvNotification : void* in/out -> "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 HttpFilterProc(HTTP_FILTER_CONTEXT* pfc, DWORD NotificationType, void* pvNotification)
#uselib "RpcProxy.dll"
#cfunc global HttpFilterProc "HttpFilterProc" var, int, intptr
; res = HttpFilterProc(pfc, NotificationType, pvNotification)
; pfc : HTTP_FILTER_CONTEXT* in/out -> "var"
; NotificationType : DWORD -> "int"
; pvNotification : void* in/out -> "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 (
	rpcproxy = windows.NewLazySystemDLL("RpcProxy.dll")
	procHttpFilterProc = rpcproxy.NewProc("HttpFilterProc")
)

// pfc (HTTP_FILTER_CONTEXT* in/out), NotificationType (DWORD), pvNotification (void* in/out)
r1, _, err := procHttpFilterProc.Call(
	uintptr(pfc),
	uintptr(NotificationType),
	uintptr(pvNotification),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function HttpFilterProc(
  pfc: Pointer;   // HTTP_FILTER_CONTEXT* in/out
  NotificationType: DWORD;   // DWORD
  pvNotification: Pointer   // void* in/out
): DWORD; stdcall;
  external 'RpcProxy.dll' name 'HttpFilterProc';

result := DllCall("RpcProxy\HttpFilterProc"
    , "Ptr", pfc   ; HTTP_FILTER_CONTEXT* in/out
    , "UInt", NotificationType   ; DWORD
    , "Ptr", pvNotification   ; void* in/out
    , "UInt")   ; return: DWORD

●HttpFilterProc(pfc, NotificationType, pvNotification) = DLL("RpcProxy.dll", "dword HttpFilterProc(void*, dword, void*)")
# 呼び出し: HttpFilterProc(pfc, NotificationType, pvNotification)
# pfc : HTTP_FILTER_CONTEXT* in/out -> "void*"
# NotificationType : DWORD -> "dword"
# pvNotification : void* in/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)。