PeerDistServerRetrieveContentInformation

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

DWORD PeerDistServerRetrieveContentInformation(
    INT_PTR hPeerDist,
    INT_PTR hContentInfo,
    DWORD cbMaxNumberOfBytes,
    BYTE* pBuffer,
    OVERLAPPED* lpOverlapped
);

<DllImport("PeerDist.dll", ExactSpelling:=True)>
Public Shared Function PeerDistServerRetrieveContentInformation(
    hPeerDist As IntPtr,   ' INT_PTR
    hContentInfo As IntPtr,   ' INT_PTR
    cbMaxNumberOfBytes As UInteger,   ' DWORD
    pBuffer As IntPtr,   ' BYTE* out
    lpOverlapped As IntPtr   ' OVERLAPPED*
) As UInteger
End Function

' hPeerDist : INT_PTR
' hContentInfo : INT_PTR
' cbMaxNumberOfBytes : DWORD
' pBuffer : BYTE* out
' lpOverlapped : OVERLAPPED*
Declare PtrSafe Function PeerDistServerRetrieveContentInformation Lib "peerdist" ( _
    ByVal hPeerDist As LongPtr, _
    ByVal hContentInfo As LongPtr, _
    ByVal cbMaxNumberOfBytes As Long, _
    ByVal pBuffer As LongPtr, _
    ByVal lpOverlapped 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

PeerDistServerRetrieveContentInformation = ctypes.windll.peerdist.PeerDistServerRetrieveContentInformation
PeerDistServerRetrieveContentInformation.restype = wintypes.DWORD
PeerDistServerRetrieveContentInformation.argtypes = [
    ctypes.c_ssize_t,  # hPeerDist : INT_PTR
    ctypes.c_ssize_t,  # hContentInfo : INT_PTR
    wintypes.DWORD,  # cbMaxNumberOfBytes : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # pBuffer : BYTE* out
    ctypes.c_void_p,  # lpOverlapped : OVERLAPPED*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PeerDist.dll')
PeerDistServerRetrieveContentInformation = Fiddle::Function.new(
  lib['PeerDistServerRetrieveContentInformation'],
  [
    Fiddle::TYPE_INTPTR_T,  # hPeerDist : INT_PTR
    Fiddle::TYPE_INTPTR_T,  # hContentInfo : INT_PTR
    -Fiddle::TYPE_INT,  # cbMaxNumberOfBytes : DWORD
    Fiddle::TYPE_VOIDP,  # pBuffer : BYTE* out
    Fiddle::TYPE_VOIDP,  # lpOverlapped : OVERLAPPED*
  ],
  -Fiddle::TYPE_INT)

#[link(name = "peerdist")]
extern "system" {
    fn PeerDistServerRetrieveContentInformation(
        hPeerDist: isize,  // INT_PTR
        hContentInfo: isize,  // INT_PTR
        cbMaxNumberOfBytes: u32,  // DWORD
        pBuffer: *mut u8,  // BYTE* out
        lpOverlapped: *mut OVERLAPPED  // OVERLAPPED*
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("PeerDist.dll")]
public static extern uint PeerDistServerRetrieveContentInformation(IntPtr hPeerDist, IntPtr hContentInfo, uint cbMaxNumberOfBytes, IntPtr pBuffer, IntPtr lpOverlapped);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PeerDist_PeerDistServerRetrieveContentInformation' -Namespace Win32 -PassThru
# $api::PeerDistServerRetrieveContentInformation(hPeerDist, hContentInfo, cbMaxNumberOfBytes, pBuffer, lpOverlapped)

#uselib "PeerDist.dll"
#func global PeerDistServerRetrieveContentInformation "PeerDistServerRetrieveContentInformation" sptr, sptr, sptr, sptr, sptr
; PeerDistServerRetrieveContentInformation hPeerDist, hContentInfo, cbMaxNumberOfBytes, varptr(pBuffer), varptr(lpOverlapped)   ; 戻り値は stat
; hPeerDist : INT_PTR -> "sptr"
; hContentInfo : INT_PTR -> "sptr"
; cbMaxNumberOfBytes : DWORD -> "sptr"
; pBuffer : BYTE* out -> "sptr"
; lpOverlapped : OVERLAPPED* -> "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 "PeerDist.dll"
#cfunc global PeerDistServerRetrieveContentInformation "PeerDistServerRetrieveContentInformation" sptr, sptr, int, var, var
; res = PeerDistServerRetrieveContentInformation(hPeerDist, hContentInfo, cbMaxNumberOfBytes, pBuffer, lpOverlapped)
; hPeerDist : INT_PTR -> "sptr"
; hContentInfo : INT_PTR -> "sptr"
; cbMaxNumberOfBytes : DWORD -> "int"
; pBuffer : BYTE* out -> "var"
; lpOverlapped : OVERLAPPED* -> "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。

; DWORD PeerDistServerRetrieveContentInformation(INT_PTR hPeerDist, INT_PTR hContentInfo, DWORD cbMaxNumberOfBytes, BYTE* pBuffer, OVERLAPPED* lpOverlapped)
#uselib "PeerDist.dll"
#cfunc global PeerDistServerRetrieveContentInformation "PeerDistServerRetrieveContentInformation" intptr, intptr, int, var, var
; res = PeerDistServerRetrieveContentInformation(hPeerDist, hContentInfo, cbMaxNumberOfBytes, pBuffer, lpOverlapped)
; hPeerDist : INT_PTR -> "intptr"
; hContentInfo : INT_PTR -> "intptr"
; cbMaxNumberOfBytes : DWORD -> "int"
; pBuffer : BYTE* out -> "var"
; lpOverlapped : OVERLAPPED* -> "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 (
	peerdist = windows.NewLazySystemDLL("PeerDist.dll")
	procPeerDistServerRetrieveContentInformation = peerdist.NewProc("PeerDistServerRetrieveContentInformation")
)

// hPeerDist (INT_PTR), hContentInfo (INT_PTR), cbMaxNumberOfBytes (DWORD), pBuffer (BYTE* out), lpOverlapped (OVERLAPPED*)
r1, _, err := procPeerDistServerRetrieveContentInformation.Call(
	uintptr(hPeerDist),
	uintptr(hContentInfo),
	uintptr(cbMaxNumberOfBytes),
	uintptr(pBuffer),
	uintptr(lpOverlapped),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PeerDistServerRetrieveContentInformation(
  hPeerDist: NativeInt;   // INT_PTR
  hContentInfo: NativeInt;   // INT_PTR
  cbMaxNumberOfBytes: DWORD;   // DWORD
  pBuffer: Pointer;   // BYTE* out
  lpOverlapped: Pointer   // OVERLAPPED*
): DWORD; stdcall;
  external 'PeerDist.dll' name 'PeerDistServerRetrieveContentInformation';

result := DllCall("PeerDist\PeerDistServerRetrieveContentInformation"
    , "Ptr", hPeerDist   ; INT_PTR
    , "Ptr", hContentInfo   ; INT_PTR
    , "UInt", cbMaxNumberOfBytes   ; DWORD
    , "Ptr", pBuffer   ; BYTE* out
    , "Ptr", lpOverlapped   ; OVERLAPPED*
    , "UInt")   ; return: DWORD

●PeerDistServerRetrieveContentInformation(hPeerDist, hContentInfo, cbMaxNumberOfBytes, pBuffer, lpOverlapped) = DLL("PeerDist.dll", "dword PeerDistServerRetrieveContentInformation(int, int, dword, void*, void*)")
# 呼び出し: PeerDistServerRetrieveContentInformation(hPeerDist, hContentInfo, cbMaxNumberOfBytes, pBuffer, lpOverlapped)
# hPeerDist : INT_PTR -> "int"
# hContentInfo : INT_PTR -> "int"
# cbMaxNumberOfBytes : DWORD -> "dword"
# pBuffer : BYTE* out -> "void*"
# lpOverlapped : OVERLAPPED* -> "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)。