PeerCreatePeerName

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

HRESULT PeerCreatePeerName(
    LPCWSTR pwzIdentity,   // optional
    LPCWSTR pwzClassifier,   // optional
    LPWSTR* ppwzPeerName
);

<DllImport("P2P.dll", ExactSpelling:=True)>
Public Shared Function PeerCreatePeerName(
    <MarshalAs(UnmanagedType.LPWStr)> pwzIdentity As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> pwzClassifier As String,   ' LPCWSTR optional
    ppwzPeerName As IntPtr   ' LPWSTR* out
) As Integer
End Function

' pwzIdentity : LPCWSTR optional
' pwzClassifier : LPCWSTR optional
' ppwzPeerName : LPWSTR* out
Declare PtrSafe Function PeerCreatePeerName Lib "p2p" ( _
    ByVal pwzIdentity As LongPtr, _
    ByVal pwzClassifier As LongPtr, _
    ByVal ppwzPeerName 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

PeerCreatePeerName = ctypes.windll.p2p.PeerCreatePeerName
PeerCreatePeerName.restype = ctypes.c_int
PeerCreatePeerName.argtypes = [
    wintypes.LPCWSTR,  # pwzIdentity : LPCWSTR optional
    wintypes.LPCWSTR,  # pwzClassifier : LPCWSTR optional
    ctypes.c_void_p,  # ppwzPeerName : LPWSTR* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('P2P.dll')
PeerCreatePeerName = Fiddle::Function.new(
  lib['PeerCreatePeerName'],
  [
    Fiddle::TYPE_VOIDP,  # pwzIdentity : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pwzClassifier : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # ppwzPeerName : LPWSTR* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "p2p")]
extern "system" {
    fn PeerCreatePeerName(
        pwzIdentity: *const u16,  // LPCWSTR optional
        pwzClassifier: *const u16,  // LPCWSTR optional
        ppwzPeerName: *mut *mut u16  // LPWSTR* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("P2P.dll")]
public static extern int PeerCreatePeerName([MarshalAs(UnmanagedType.LPWStr)] string pwzIdentity, [MarshalAs(UnmanagedType.LPWStr)] string pwzClassifier, IntPtr ppwzPeerName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'P2P_PeerCreatePeerName' -Namespace Win32 -PassThru
# $api::PeerCreatePeerName(pwzIdentity, pwzClassifier, ppwzPeerName)

#uselib "P2P.dll"
#func global PeerCreatePeerName "PeerCreatePeerName" sptr, sptr, sptr
; PeerCreatePeerName pwzIdentity, pwzClassifier, varptr(ppwzPeerName)   ; 戻り値は stat
; pwzIdentity : LPCWSTR optional -> "sptr"
; pwzClassifier : LPCWSTR optional -> "sptr"
; ppwzPeerName : LPWSTR* 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 PeerCreatePeerName "PeerCreatePeerName" wstr, wstr, var
; res = PeerCreatePeerName(pwzIdentity, pwzClassifier, ppwzPeerName)
; pwzIdentity : LPCWSTR optional -> "wstr"
; pwzClassifier : LPCWSTR optional -> "wstr"
; ppwzPeerName : LPWSTR* out -> "var"
; ※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 PeerCreatePeerName(LPCWSTR pwzIdentity, LPCWSTR pwzClassifier, LPWSTR* ppwzPeerName)
#uselib "P2P.dll"
#cfunc global PeerCreatePeerName "PeerCreatePeerName" wstr, wstr, var
; res = PeerCreatePeerName(pwzIdentity, pwzClassifier, ppwzPeerName)
; pwzIdentity : LPCWSTR optional -> "wstr"
; pwzClassifier : LPCWSTR optional -> "wstr"
; ppwzPeerName : LPWSTR* out -> "var"
; ※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")
	procPeerCreatePeerName = p2p.NewProc("PeerCreatePeerName")
)

// pwzIdentity (LPCWSTR optional), pwzClassifier (LPCWSTR optional), ppwzPeerName (LPWSTR* out)
r1, _, err := procPeerCreatePeerName.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwzIdentity))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwzClassifier))),
	uintptr(ppwzPeerName),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function PeerCreatePeerName(
  pwzIdentity: PWideChar;   // LPCWSTR optional
  pwzClassifier: PWideChar;   // LPCWSTR optional
  ppwzPeerName: PPWideChar   // LPWSTR* out
): Integer; stdcall;
  external 'P2P.dll' name 'PeerCreatePeerName';

result := DllCall("P2P\PeerCreatePeerName"
    , "WStr", pwzIdentity   ; LPCWSTR optional
    , "WStr", pwzClassifier   ; LPCWSTR optional
    , "Ptr", ppwzPeerName   ; LPWSTR* out
    , "Int")   ; return: HRESULT

●PeerCreatePeerName(pwzIdentity, pwzClassifier, ppwzPeerName) = DLL("P2P.dll", "int PeerCreatePeerName(char*, char*, void*)")
# 呼び出し: PeerCreatePeerName(pwzIdentity, pwzClassifier, ppwzPeerName)
# pwzIdentity : LPCWSTR optional -> "char*"
# pwzClassifier : LPCWSTR optional -> "char*"
# ppwzPeerName : LPWSTR* 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)。