PeerGroupEnumConnections

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

HRESULT PeerGroupEnumConnections(
    void* hGroup,
    DWORD dwFlags,
    void** phPeerEnum
);

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

' hGroup : void*
' dwFlags : DWORD
' phPeerEnum : void** out
Declare PtrSafe Function PeerGroupEnumConnections Lib "p2p" ( _
    ByVal hGroup As LongPtr, _
    ByVal dwFlags As Long, _
    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

PeerGroupEnumConnections = ctypes.windll.p2p.PeerGroupEnumConnections
PeerGroupEnumConnections.restype = ctypes.c_int
PeerGroupEnumConnections.argtypes = [
    ctypes.POINTER(None),  # hGroup : void*
    wintypes.DWORD,  # dwFlags : DWORD
    ctypes.c_void_p,  # phPeerEnum : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('P2P.dll')
PeerGroupEnumConnections = Fiddle::Function.new(
  lib['PeerGroupEnumConnections'],
  [
    Fiddle::TYPE_VOIDP,  # hGroup : void*
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # phPeerEnum : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "p2p")]
extern "system" {
    fn PeerGroupEnumConnections(
        hGroup: *mut (),  // void*
        dwFlags: u32,  // DWORD
        phPeerEnum: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("P2P.dll")]
public static extern int PeerGroupEnumConnections(IntPtr hGroup, uint dwFlags, IntPtr phPeerEnum);
"@
$api = Add-Type -MemberDefinition $sig -Name 'P2P_PeerGroupEnumConnections' -Namespace Win32 -PassThru
# $api::PeerGroupEnumConnections(hGroup, dwFlags, phPeerEnum)

#uselib "P2P.dll"
#func global PeerGroupEnumConnections "PeerGroupEnumConnections" sptr, sptr, sptr
; PeerGroupEnumConnections hGroup, dwFlags, phPeerEnum   ; 戻り値は stat
; hGroup : void* -> "sptr"
; dwFlags : DWORD -> "sptr"
; 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 PeerGroupEnumConnections "PeerGroupEnumConnections" sptr, int, sptr
; res = PeerGroupEnumConnections(hGroup, dwFlags, phPeerEnum)
; hGroup : void* -> "sptr"
; dwFlags : DWORD -> "int"
; phPeerEnum : void** out -> "sptr"

; HRESULT PeerGroupEnumConnections(void* hGroup, DWORD dwFlags, void** phPeerEnum)
#uselib "P2P.dll"
#cfunc global PeerGroupEnumConnections "PeerGroupEnumConnections" intptr, int, intptr
; res = PeerGroupEnumConnections(hGroup, dwFlags, phPeerEnum)
; hGroup : void* -> "intptr"
; dwFlags : DWORD -> "int"
; phPeerEnum : void** out -> "intptr"

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

var (
	p2p = windows.NewLazySystemDLL("P2P.dll")
	procPeerGroupEnumConnections = p2p.NewProc("PeerGroupEnumConnections")
)

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

function PeerGroupEnumConnections(
  hGroup: Pointer;   // void*
  dwFlags: DWORD;   // DWORD
  phPeerEnum: Pointer   // void** out
): Integer; stdcall;
  external 'P2P.dll' name 'PeerGroupEnumConnections';

result := DllCall("P2P\PeerGroupEnumConnections"
    , "Ptr", hGroup   ; void*
    , "UInt", dwFlags   ; DWORD
    , "Ptr", phPeerEnum   ; void** out
    , "Int")   ; return: HRESULT

●PeerGroupEnumConnections(hGroup, dwFlags, phPeerEnum) = DLL("P2P.dll", "int PeerGroupEnumConnections(void*, dword, void*)")
# 呼び出し: PeerGroupEnumConnections(hGroup, dwFlags, phPeerEnum)
# hGroup : void* -> "void*"
# dwFlags : DWORD -> "dword"
# 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)。