PeerGraphEnumNodes

// P2PGRAPH.dll
#include <windows.h>

HRESULT PeerGraphEnumNodes(
    void* hGraph,
    LPCWSTR pwzPeerId,   // optional
    void** phPeerEnum
);

<DllImport("P2PGRAPH.dll", ExactSpelling:=True)>
Public Shared Function PeerGraphEnumNodes(
    hGraph As IntPtr,   ' void*
    <MarshalAs(UnmanagedType.LPWStr)> pwzPeerId As String,   ' LPCWSTR optional
    phPeerEnum As IntPtr   ' void** out
) As Integer
End Function

' hGraph : void*
' pwzPeerId : LPCWSTR optional
' phPeerEnum : void** out
Declare PtrSafe Function PeerGraphEnumNodes Lib "p2pgraph" ( _
    ByVal hGraph As LongPtr, _
    ByVal pwzPeerId As LongPtr, _
    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

PeerGraphEnumNodes = ctypes.windll.p2pgraph.PeerGraphEnumNodes
PeerGraphEnumNodes.restype = ctypes.c_int
PeerGraphEnumNodes.argtypes = [
    ctypes.POINTER(None),  # hGraph : void*
    wintypes.LPCWSTR,  # pwzPeerId : LPCWSTR optional
    ctypes.c_void_p,  # phPeerEnum : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('P2PGRAPH.dll')
PeerGraphEnumNodes = Fiddle::Function.new(
  lib['PeerGraphEnumNodes'],
  [
    Fiddle::TYPE_VOIDP,  # hGraph : void*
    Fiddle::TYPE_VOIDP,  # pwzPeerId : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # phPeerEnum : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "p2pgraph")]
extern "system" {
    fn PeerGraphEnumNodes(
        hGraph: *mut (),  // void*
        pwzPeerId: *const u16,  // LPCWSTR optional
        phPeerEnum: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("P2PGRAPH.dll")]
public static extern int PeerGraphEnumNodes(IntPtr hGraph, [MarshalAs(UnmanagedType.LPWStr)] string pwzPeerId, IntPtr phPeerEnum);
"@
$api = Add-Type -MemberDefinition $sig -Name 'P2PGRAPH_PeerGraphEnumNodes' -Namespace Win32 -PassThru
# $api::PeerGraphEnumNodes(hGraph, pwzPeerId, phPeerEnum)

#uselib "P2PGRAPH.dll"
#func global PeerGraphEnumNodes "PeerGraphEnumNodes" sptr, sptr, sptr
; PeerGraphEnumNodes hGraph, pwzPeerId, phPeerEnum   ; 戻り値は stat
; hGraph : void* -> "sptr"
; pwzPeerId : LPCWSTR optional -> "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 "P2PGRAPH.dll"
#cfunc global PeerGraphEnumNodes "PeerGraphEnumNodes" sptr, wstr, sptr
; res = PeerGraphEnumNodes(hGraph, pwzPeerId, phPeerEnum)
; hGraph : void* -> "sptr"
; pwzPeerId : LPCWSTR optional -> "wstr"
; phPeerEnum : void** out -> "sptr"

; HRESULT PeerGraphEnumNodes(void* hGraph, LPCWSTR pwzPeerId, void** phPeerEnum)
#uselib "P2PGRAPH.dll"
#cfunc global PeerGraphEnumNodes "PeerGraphEnumNodes" intptr, wstr, intptr
; res = PeerGraphEnumNodes(hGraph, pwzPeerId, phPeerEnum)
; hGraph : void* -> "intptr"
; pwzPeerId : LPCWSTR optional -> "wstr"
; phPeerEnum : void** out -> "intptr"

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

var (
	p2pgraph = windows.NewLazySystemDLL("P2PGRAPH.dll")
	procPeerGraphEnumNodes = p2pgraph.NewProc("PeerGraphEnumNodes")
)

// hGraph (void*), pwzPeerId (LPCWSTR optional), phPeerEnum (void** out)
r1, _, err := procPeerGraphEnumNodes.Call(
	uintptr(hGraph),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwzPeerId))),
	uintptr(phPeerEnum),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function PeerGraphEnumNodes(
  hGraph: Pointer;   // void*
  pwzPeerId: PWideChar;   // LPCWSTR optional
  phPeerEnum: Pointer   // void** out
): Integer; stdcall;
  external 'P2PGRAPH.dll' name 'PeerGraphEnumNodes';

result := DllCall("P2PGRAPH\PeerGraphEnumNodes"
    , "Ptr", hGraph   ; void*
    , "WStr", pwzPeerId   ; LPCWSTR optional
    , "Ptr", phPeerEnum   ; void** out
    , "Int")   ; return: HRESULT

●PeerGraphEnumNodes(hGraph, pwzPeerId, phPeerEnum) = DLL("P2PGRAPH.dll", "int PeerGraphEnumNodes(void*, char*, void*)")
# 呼び出し: PeerGraphEnumNodes(hGraph, pwzPeerId, phPeerEnum)
# hGraph : void* -> "void*"
# pwzPeerId : LPCWSTR optional -> "char*"
# 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)。