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TdhEnumerateProviders

関数

システムに登録されているイベントプロバイダーを列挙する。

DLLTDH.dll呼出規約winapi対応OSWindows Vista 以降

シグネチャ

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

DWORD TdhEnumerateProviders(
    PROVIDER_ENUMERATION_INFO* pBuffer,   // optional
    DWORD* pBufferSize
);

パラメーター

名前	型	方向	説明
pBuffer	PROVIDER_ENUMERATION_INFO*	outoptional	登録済みプロバイダ一覧を受け取るPROVIDER_ENUMERATION_INFO構造体。
pBufferSize	DWORD*	inout	入力でバッファサイズ、出力で必要サイズを受け取るポインタ。

戻り値の型: DWORD

各言語での呼び出し定義

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

DWORD TdhEnumerateProviders(
    PROVIDER_ENUMERATION_INFO* pBuffer,   // optional
    DWORD* pBufferSize
);

[DllImport("TDH.dll", ExactSpelling = true)]
static extern uint TdhEnumerateProviders(
    IntPtr pBuffer,   // PROVIDER_ENUMERATION_INFO* optional, out
    ref uint pBufferSize   // DWORD* in/out
);

<DllImport("TDH.dll", ExactSpelling:=True)>
Public Shared Function TdhEnumerateProviders(
    pBuffer As IntPtr,   ' PROVIDER_ENUMERATION_INFO* optional, out
    ByRef pBufferSize As UInteger   ' DWORD* in/out
) As UInteger
End Function

' pBuffer : PROVIDER_ENUMERATION_INFO* optional, out
' pBufferSize : DWORD* in/out
Declare PtrSafe Function TdhEnumerateProviders Lib "tdh" ( _
    ByVal pBuffer As LongPtr, _
    ByRef pBufferSize 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

TdhEnumerateProviders = ctypes.windll.tdh.TdhEnumerateProviders
TdhEnumerateProviders.restype = wintypes.DWORD
TdhEnumerateProviders.argtypes = [
    ctypes.c_void_p,  # pBuffer : PROVIDER_ENUMERATION_INFO* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pBufferSize : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('TDH.dll')
TdhEnumerateProviders = Fiddle::Function.new(
  lib['TdhEnumerateProviders'],
  [
    Fiddle::TYPE_VOIDP,  # pBuffer : PROVIDER_ENUMERATION_INFO* optional, out
    Fiddle::TYPE_VOIDP,  # pBufferSize : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "tdh")]
extern "system" {
    fn TdhEnumerateProviders(
        pBuffer: *mut PROVIDER_ENUMERATION_INFO,  // PROVIDER_ENUMERATION_INFO* optional, out
        pBufferSize: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("TDH.dll")]
public static extern uint TdhEnumerateProviders(IntPtr pBuffer, ref uint pBufferSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'TDH_TdhEnumerateProviders' -Namespace Win32 -PassThru
# $api::TdhEnumerateProviders(pBuffer, pBufferSize)

#uselib "TDH.dll"
#func global TdhEnumerateProviders "TdhEnumerateProviders" sptr, sptr
; TdhEnumerateProviders varptr(pBuffer), varptr(pBufferSize)   ; 戻り値は stat
; pBuffer : PROVIDER_ENUMERATION_INFO* optional, out -> "sptr"
; pBufferSize : DWORD* in/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 "TDH.dll"
#cfunc global TdhEnumerateProviders "TdhEnumerateProviders" var, var
; res = TdhEnumerateProviders(pBuffer, pBufferSize)
; pBuffer : PROVIDER_ENUMERATION_INFO* optional, out -> "var"
; pBufferSize : DWORD* in/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 "TDH.dll"
#cfunc global TdhEnumerateProviders "TdhEnumerateProviders" sptr, sptr
; res = TdhEnumerateProviders(varptr(pBuffer), varptr(pBufferSize))
; pBuffer : PROVIDER_ENUMERATION_INFO* optional, out -> "sptr"
; pBufferSize : DWORD* in/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:

; DWORD TdhEnumerateProviders(PROVIDER_ENUMERATION_INFO* pBuffer, DWORD* pBufferSize)
#uselib "TDH.dll"
#cfunc global TdhEnumerateProviders "TdhEnumerateProviders" var, var
; res = TdhEnumerateProviders(pBuffer, pBufferSize)
; pBuffer : PROVIDER_ENUMERATION_INFO* optional, out -> "var"
; pBufferSize : DWORD* in/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。; DWORD TdhEnumerateProviders(PROVIDER_ENUMERATION_INFO* pBuffer, DWORD* pBufferSize)
#uselib "TDH.dll"
#cfunc global TdhEnumerateProviders "TdhEnumerateProviders" intptr, intptr
; res = TdhEnumerateProviders(varptr(pBuffer), varptr(pBufferSize))
; pBuffer : PROVIDER_ENUMERATION_INFO* optional, out -> "intptr"
; pBufferSize : DWORD* in/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 (
	tdh = windows.NewLazySystemDLL("TDH.dll")
	procTdhEnumerateProviders = tdh.NewProc("TdhEnumerateProviders")
)

// pBuffer (PROVIDER_ENUMERATION_INFO* optional, out), pBufferSize (DWORD* in/out)
r1, _, err := procTdhEnumerateProviders.Call(
	uintptr(pBuffer),
	uintptr(pBufferSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function TdhEnumerateProviders(
  pBuffer: Pointer;   // PROVIDER_ENUMERATION_INFO* optional, out
  pBufferSize: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'TDH.dll' name 'TdhEnumerateProviders';

result := DllCall("TDH\TdhEnumerateProviders"
    , "Ptr", pBuffer   ; PROVIDER_ENUMERATION_INFO* optional, out
    , "Ptr", pBufferSize   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●TdhEnumerateProviders(pBuffer, pBufferSize) = DLL("TDH.dll", "dword TdhEnumerateProviders(void*, void*)")
# 呼び出し: TdhEnumerateProviders(pBuffer, pBufferSize)
# pBuffer : PROVIDER_ENUMERATION_INFO* optional, out -> "void*"
# pBufferSize : DWORD* in/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)。