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PeerGraphGetItemCount

関数

ピア列挙ハンドル内の項目数を取得する。

DLLP2PGRAPH.dll呼出規約winapi対応OSWindows XP 以降

シグネチャ

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

HRESULT PeerGraphGetItemCount(
    void* hPeerEnum,
    DWORD* pCount
);

パラメーター

名前	型	方向
hPeerEnum	void*	in
pCount	DWORD*	out

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT PeerGraphGetItemCount(
    void* hPeerEnum,
    DWORD* pCount
);

[DllImport("P2PGRAPH.dll", ExactSpelling = true)]
static extern int PeerGraphGetItemCount(
    IntPtr hPeerEnum,   // void*
    out uint pCount   // DWORD* out
);

<DllImport("P2PGRAPH.dll", ExactSpelling:=True)>
Public Shared Function PeerGraphGetItemCount(
    hPeerEnum As IntPtr,   ' void*
    <Out> ByRef pCount As UInteger   ' DWORD* out
) As Integer
End Function

' hPeerEnum : void*
' pCount : DWORD* out
Declare PtrSafe Function PeerGraphGetItemCount Lib "p2pgraph" ( _
    ByVal hPeerEnum As LongPtr, _
    ByRef pCount 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

PeerGraphGetItemCount = ctypes.windll.p2pgraph.PeerGraphGetItemCount
PeerGraphGetItemCount.restype = ctypes.c_int
PeerGraphGetItemCount.argtypes = [
    ctypes.POINTER(None),  # hPeerEnum : void*
    ctypes.POINTER(wintypes.DWORD),  # pCount : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('P2PGRAPH.dll')
PeerGraphGetItemCount = Fiddle::Function.new(
  lib['PeerGraphGetItemCount'],
  [
    Fiddle::TYPE_VOIDP,  # hPeerEnum : void*
    Fiddle::TYPE_VOIDP,  # pCount : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "p2pgraph")]
extern "system" {
    fn PeerGraphGetItemCount(
        hPeerEnum: *mut (),  // void*
        pCount: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("P2PGRAPH.dll")]
public static extern int PeerGraphGetItemCount(IntPtr hPeerEnum, out uint pCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'P2PGRAPH_PeerGraphGetItemCount' -Namespace Win32 -PassThru
# $api::PeerGraphGetItemCount(hPeerEnum, pCount)

#uselib "P2PGRAPH.dll"
#func global PeerGraphGetItemCount "PeerGraphGetItemCount" sptr, sptr
; PeerGraphGetItemCount hPeerEnum, varptr(pCount)   ; 戻り値は stat
; hPeerEnum : void* -> "sptr"
; pCount : 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。

出力引数:

#uselib "P2PGRAPH.dll"
#cfunc global PeerGraphGetItemCount "PeerGraphGetItemCount" sptr, var
; res = PeerGraphGetItemCount(hPeerEnum, pCount)
; hPeerEnum : void* -> "sptr"
; pCount : 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。#uselib "P2PGRAPH.dll"
#cfunc global PeerGraphGetItemCount "PeerGraphGetItemCount" sptr, sptr
; res = PeerGraphGetItemCount(hPeerEnum, varptr(pCount))
; hPeerEnum : void* -> "sptr"
; pCount : DWORD* out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; HRESULT PeerGraphGetItemCount(void* hPeerEnum, DWORD* pCount)
#uselib "P2PGRAPH.dll"
#cfunc global PeerGraphGetItemCount "PeerGraphGetItemCount" intptr, var
; res = PeerGraphGetItemCount(hPeerEnum, pCount)
; hPeerEnum : void* -> "intptr"
; pCount : 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 PeerGraphGetItemCount(void* hPeerEnum, DWORD* pCount)
#uselib "P2PGRAPH.dll"
#cfunc global PeerGraphGetItemCount "PeerGraphGetItemCount" intptr, intptr
; res = PeerGraphGetItemCount(hPeerEnum, varptr(pCount))
; hPeerEnum : void* -> "intptr"
; pCount : DWORD* out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	p2pgraph = windows.NewLazySystemDLL("P2PGRAPH.dll")
	procPeerGraphGetItemCount = p2pgraph.NewProc("PeerGraphGetItemCount")
)

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

function PeerGraphGetItemCount(
  hPeerEnum: Pointer;   // void*
  pCount: Pointer   // DWORD* out
): Integer; stdcall;
  external 'P2PGRAPH.dll' name 'PeerGraphGetItemCount';

result := DllCall("P2PGRAPH\PeerGraphGetItemCount"
    , "Ptr", hPeerEnum   ; void*
    , "Ptr", pCount   ; DWORD* out
    , "Int")   ; return: HRESULT

●PeerGraphGetItemCount(hPeerEnum, pCount) = DLL("P2PGRAPH.dll", "int PeerGraphGetItemCount(void*, void*)")
# 呼び出し: PeerGraphGetItemCount(hPeerEnum, pCount)
# hPeerEnum : void* -> "void*"
# pCount : 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)。