PeerGroupGetStatus

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

HRESULT PeerGroupGetStatus(
    void* hGroup,
    DWORD* pdwStatus
);

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

' hGroup : void*
' pdwStatus : DWORD* out
Declare PtrSafe Function PeerGroupGetStatus Lib "p2p" ( _
    ByVal hGroup As LongPtr, _
    ByRef pdwStatus As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PeerGroupGetStatus = ctypes.windll.p2p.PeerGroupGetStatus
PeerGroupGetStatus.restype = ctypes.c_int
PeerGroupGetStatus.argtypes = [
    ctypes.POINTER(None),  # hGroup : void*
    ctypes.POINTER(wintypes.DWORD),  # pdwStatus : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

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

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

$sig = @"
[DllImport("P2P.dll")]
public static extern int PeerGroupGetStatus(IntPtr hGroup, out uint pdwStatus);
"@
$api = Add-Type -MemberDefinition $sig -Name 'P2P_PeerGroupGetStatus' -Namespace Win32 -PassThru
# $api::PeerGroupGetStatus(hGroup, pdwStatus)

#uselib "P2P.dll"
#func global PeerGroupGetStatus "PeerGroupGetStatus" sptr, sptr
; PeerGroupGetStatus hGroup, varptr(pdwStatus)   ; 戻り値は stat
; hGroup : void* -> "sptr"
; pdwStatus : DWORD* 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 PeerGroupGetStatus "PeerGroupGetStatus" sptr, var
; res = PeerGroupGetStatus(hGroup, pdwStatus)
; hGroup : void* -> "sptr"
; pdwStatus : DWORD* 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 PeerGroupGetStatus(void* hGroup, DWORD* pdwStatus)
#uselib "P2P.dll"
#cfunc global PeerGroupGetStatus "PeerGroupGetStatus" intptr, var
; res = PeerGroupGetStatus(hGroup, pdwStatus)
; hGroup : void* -> "intptr"
; pdwStatus : DWORD* 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")
	procPeerGroupGetStatus = p2p.NewProc("PeerGroupGetStatus")
)

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

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

result := DllCall("P2P\PeerGroupGetStatus"
    , "Ptr", hGroup   ; void*
    , "Ptr", pdwStatus   ; DWORD* out
    , "Int")   ; return: HRESULT

●PeerGroupGetStatus(hGroup, pdwStatus) = DLL("P2P.dll", "int PeerGroupGetStatus(void*, void*)")
# 呼び出し: PeerGroupGetStatus(hGroup, pdwStatus)
# hGroup : void* -> "void*"
# pdwStatus : DWORD* 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)。