PeerEnumIdentities

// P2P.dll
#include <windows.h>

HRESULT PeerEnumIdentities(
    void** phPeerEnum
);

<DllImport("P2P.dll", ExactSpelling:=True)>
Public Shared Function PeerEnumIdentities(
    phPeerEnum As IntPtr   ' void** out
) As Integer
End Function

' phPeerEnum : void** out
Declare PtrSafe Function PeerEnumIdentities Lib "p2p" ( _
    ByVal phPeerEnum 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

PeerEnumIdentities = ctypes.windll.p2p.PeerEnumIdentities
PeerEnumIdentities.restype = ctypes.c_int
PeerEnumIdentities.argtypes = [
    ctypes.c_void_p,  # phPeerEnum : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('P2P.dll')
PeerEnumIdentities = Fiddle::Function.new(
  lib['PeerEnumIdentities'],
  [
    Fiddle::TYPE_VOIDP,  # phPeerEnum : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "p2p")]
extern "system" {
    fn PeerEnumIdentities(
        phPeerEnum: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("P2P.dll")]
public static extern int PeerEnumIdentities(IntPtr phPeerEnum);
"@
$api = Add-Type -MemberDefinition $sig -Name 'P2P_PeerEnumIdentities' -Namespace Win32 -PassThru
# $api::PeerEnumIdentities(phPeerEnum)

#uselib "P2P.dll"
#func global PeerEnumIdentities "PeerEnumIdentities" sptr
; PeerEnumIdentities phPeerEnum   ; 戻り値は stat
; phPeerEnum : void** 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 "P2P.dll"
#cfunc global PeerEnumIdentities "PeerEnumIdentities" sptr
; res = PeerEnumIdentities(phPeerEnum)
; phPeerEnum : void** out -> "sptr"

; HRESULT PeerEnumIdentities(void** phPeerEnum)
#uselib "P2P.dll"
#cfunc global PeerEnumIdentities "PeerEnumIdentities" intptr
; res = PeerEnumIdentities(phPeerEnum)
; phPeerEnum : void** out -> "intptr"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	p2p = windows.NewLazySystemDLL("P2P.dll")
	procPeerEnumIdentities = p2p.NewProc("PeerEnumIdentities")
)

// phPeerEnum (void** out)
r1, _, err := procPeerEnumIdentities.Call(
	uintptr(phPeerEnum),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function PeerEnumIdentities(
  phPeerEnum: Pointer   // void** out
): Integer; stdcall;
  external 'P2P.dll' name 'PeerEnumIdentities';

result := DllCall("P2P\PeerEnumIdentities"
    , "Ptr", phPeerEnum   ; void** out
    , "Int")   ; return: HRESULT

●PeerEnumIdentities(phPeerEnum) = DLL("P2P.dll", "int PeerEnumIdentities(void*)")
# 呼び出し: PeerEnumIdentities(phPeerEnum)
# phPeerEnum : void** 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)。