ホーム › Devices.DeviceAndDriverInstallation › SetupGetFieldCount

SetupGetFieldCount

関数

INF行コンテキスト内のフィールド数を取得する。

DLLSETUPAPI.dll呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

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

DWORD SetupGetFieldCount(
    INFCONTEXT* Context
);

パラメーター

名前	型	方向
Context	INFCONTEXT*	in

戻り値の型: DWORD

各言語での呼び出し定義

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

DWORD SetupGetFieldCount(
    INFCONTEXT* Context
);

[DllImport("SETUPAPI.dll", SetLastError = true, ExactSpelling = true)]
static extern uint SetupGetFieldCount(
    IntPtr Context   // INFCONTEXT*
);

<DllImport("SETUPAPI.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetupGetFieldCount(
    Context As IntPtr   ' INFCONTEXT*
) As UInteger
End Function

' Context : INFCONTEXT*
Declare PtrSafe Function SetupGetFieldCount Lib "setupapi" ( _
    ByVal Context 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

SetupGetFieldCount = ctypes.windll.setupapi.SetupGetFieldCount
SetupGetFieldCount.restype = wintypes.DWORD
SetupGetFieldCount.argtypes = [
    ctypes.c_void_p,  # Context : INFCONTEXT*
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SETUPAPI.dll')
SetupGetFieldCount = Fiddle::Function.new(
  lib['SetupGetFieldCount'],
  [
    Fiddle::TYPE_VOIDP,  # Context : INFCONTEXT*
  ],
  -Fiddle::TYPE_INT)

#[link(name = "setupapi")]
extern "system" {
    fn SetupGetFieldCount(
        Context: *mut INFCONTEXT  // INFCONTEXT*
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SETUPAPI.dll", SetLastError = true)]
public static extern uint SetupGetFieldCount(IntPtr Context);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SETUPAPI_SetupGetFieldCount' -Namespace Win32 -PassThru
# $api::SetupGetFieldCount(Context)

#uselib "SETUPAPI.dll"
#func global SetupGetFieldCount "SetupGetFieldCount" sptr
; SetupGetFieldCount varptr(Context)   ; 戻り値は stat
; Context : INFCONTEXT* -> "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 "SETUPAPI.dll"
#cfunc global SetupGetFieldCount "SetupGetFieldCount" var
; res = SetupGetFieldCount(Context)
; Context : INFCONTEXT* -> "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 "SETUPAPI.dll"
#cfunc global SetupGetFieldCount "SetupGetFieldCount" sptr
; res = SetupGetFieldCount(varptr(Context))
; Context : INFCONTEXT* -> "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 SetupGetFieldCount(INFCONTEXT* Context)
#uselib "SETUPAPI.dll"
#cfunc global SetupGetFieldCount "SetupGetFieldCount" var
; res = SetupGetFieldCount(Context)
; Context : INFCONTEXT* -> "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 SetupGetFieldCount(INFCONTEXT* Context)
#uselib "SETUPAPI.dll"
#cfunc global SetupGetFieldCount "SetupGetFieldCount" intptr
; res = SetupGetFieldCount(varptr(Context))
; Context : INFCONTEXT* -> "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 (
	setupapi = windows.NewLazySystemDLL("SETUPAPI.dll")
	procSetupGetFieldCount = setupapi.NewProc("SetupGetFieldCount")
)

// Context (INFCONTEXT*)
r1, _, err := procSetupGetFieldCount.Call(
	uintptr(Context),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function SetupGetFieldCount(
  Context: Pointer   // INFCONTEXT*
): DWORD; stdcall;
  external 'SETUPAPI.dll' name 'SetupGetFieldCount';

result := DllCall("SETUPAPI\SetupGetFieldCount"
    , "Ptr", Context   ; INFCONTEXT*
    , "UInt")   ; return: DWORD

●SetupGetFieldCount(Context) = DLL("SETUPAPI.dll", "dword SetupGetFieldCount(void*)")
# 呼び出し: SetupGetFieldCount(Context)
# Context : INFCONTEXT* -> "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)。