PeerGroupCreate

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

HRESULT PeerGroupCreate(
    PEER_GROUP_PROPERTIES* pProperties,
    void** phGroup
);

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

' pProperties : PEER_GROUP_PROPERTIES*
' phGroup : void** out
Declare PtrSafe Function PeerGroupCreate Lib "p2p" ( _
    ByVal pProperties As LongPtr, _
    ByVal phGroup 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

PeerGroupCreate = ctypes.windll.p2p.PeerGroupCreate
PeerGroupCreate.restype = ctypes.c_int
PeerGroupCreate.argtypes = [
    ctypes.c_void_p,  # pProperties : PEER_GROUP_PROPERTIES*
    ctypes.c_void_p,  # phGroup : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('P2P.dll')
PeerGroupCreate = Fiddle::Function.new(
  lib['PeerGroupCreate'],
  [
    Fiddle::TYPE_VOIDP,  # pProperties : PEER_GROUP_PROPERTIES*
    Fiddle::TYPE_VOIDP,  # phGroup : void** out
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("P2P.dll")]
public static extern int PeerGroupCreate(IntPtr pProperties, IntPtr phGroup);
"@
$api = Add-Type -MemberDefinition $sig -Name 'P2P_PeerGroupCreate' -Namespace Win32 -PassThru
# $api::PeerGroupCreate(pProperties, phGroup)

#uselib "P2P.dll"
#func global PeerGroupCreate "PeerGroupCreate" sptr, sptr
; PeerGroupCreate varptr(pProperties), phGroup   ; 戻り値は stat
; pProperties : PEER_GROUP_PROPERTIES* -> "sptr"
; phGroup : 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 PeerGroupCreate "PeerGroupCreate" var, sptr
; res = PeerGroupCreate(pProperties, phGroup)
; pProperties : PEER_GROUP_PROPERTIES* -> "var"
; phGroup : void** 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。

; HRESULT PeerGroupCreate(PEER_GROUP_PROPERTIES* pProperties, void** phGroup)
#uselib "P2P.dll"
#cfunc global PeerGroupCreate "PeerGroupCreate" var, intptr
; res = PeerGroupCreate(pProperties, phGroup)
; pProperties : PEER_GROUP_PROPERTIES* -> "var"
; phGroup : void** 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 (
	p2p = windows.NewLazySystemDLL("P2P.dll")
	procPeerGroupCreate = p2p.NewProc("PeerGroupCreate")
)

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

function PeerGroupCreate(
  pProperties: Pointer;   // PEER_GROUP_PROPERTIES*
  phGroup: Pointer   // void** out
): Integer; stdcall;
  external 'P2P.dll' name 'PeerGroupCreate';

result := DllCall("P2P\PeerGroupCreate"
    , "Ptr", pProperties   ; PEER_GROUP_PROPERTIES*
    , "Ptr", phGroup   ; void** out
    , "Int")   ; return: HRESULT

●PeerGroupCreate(pProperties, phGroup) = DLL("P2P.dll", "int PeerGroupCreate(void*, void*)")
# 呼び出し: PeerGroupCreate(pProperties, phGroup)
# pProperties : PEER_GROUP_PROPERTIES* -> "void*"
# phGroup : 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)。