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Process32Next

関数

スナップショット内の次のプロセス情報を取得する(ANSI版)。

DLLKERNEL32.dll文字セットANSI (-A)呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

BOOL Process32Next(
    HANDLE hSnapshot,
    PROCESSENTRY32* lppe
);

パラメーター

名前	型	方向
hSnapshot	HANDLE	in
lppe	PROCESSENTRY32*	inout

戻り値の型: BOOL

各言語での呼び出し定義

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

BOOL Process32Next(
    HANDLE hSnapshot,
    PROCESSENTRY32* lppe
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
static extern bool Process32Next(
    IntPtr hSnapshot,   // HANDLE
    IntPtr lppe   // PROCESSENTRY32* in/out
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function Process32Next(
    hSnapshot As IntPtr,   ' HANDLE
    lppe As IntPtr   ' PROCESSENTRY32* in/out
) As Boolean
End Function

' hSnapshot : HANDLE
' lppe : PROCESSENTRY32* in/out
Declare PtrSafe Function Process32Next Lib "kernel32" ( _
    ByVal hSnapshot As LongPtr, _
    ByVal lppe 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

Process32Next = ctypes.windll.kernel32.Process32Next
Process32Next.restype = wintypes.BOOL
Process32Next.argtypes = [
    wintypes.HANDLE,  # hSnapshot : HANDLE
    ctypes.c_void_p,  # lppe : PROCESSENTRY32* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
Process32Next = Fiddle::Function.new(
  lib['Process32Next'],
  [
    Fiddle::TYPE_VOIDP,  # hSnapshot : HANDLE
    Fiddle::TYPE_VOIDP,  # lppe : PROCESSENTRY32* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn Process32Next(
        hSnapshot: *mut core::ffi::c_void,  // HANDLE
        lppe: *mut PROCESSENTRY32  // PROCESSENTRY32* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool Process32Next(IntPtr hSnapshot, IntPtr lppe);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_Process32Next' -Namespace Win32 -PassThru
# $api::Process32Next(hSnapshot, lppe)

#uselib "KERNEL32.dll"
#func global Process32Next "Process32Next" sptr, sptr
; Process32Next hSnapshot, varptr(lppe)   ; 戻り値は stat
; hSnapshot : HANDLE -> "sptr"
; lppe : PROCESSENTRY32* 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 "KERNEL32.dll"
#cfunc global Process32Next "Process32Next" sptr, var
; res = Process32Next(hSnapshot, lppe)
; hSnapshot : HANDLE -> "sptr"
; lppe : PROCESSENTRY32* 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 "KERNEL32.dll"
#cfunc global Process32Next "Process32Next" sptr, sptr
; res = Process32Next(hSnapshot, varptr(lppe))
; hSnapshot : HANDLE -> "sptr"
; lppe : PROCESSENTRY32* 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:

; BOOL Process32Next(HANDLE hSnapshot, PROCESSENTRY32* lppe)
#uselib "KERNEL32.dll"
#cfunc global Process32Next "Process32Next" intptr, var
; res = Process32Next(hSnapshot, lppe)
; hSnapshot : HANDLE -> "intptr"
; lppe : PROCESSENTRY32* 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。; BOOL Process32Next(HANDLE hSnapshot, PROCESSENTRY32* lppe)
#uselib "KERNEL32.dll"
#cfunc global Process32Next "Process32Next" intptr, intptr
; res = Process32Next(hSnapshot, varptr(lppe))
; hSnapshot : HANDLE -> "intptr"
; lppe : PROCESSENTRY32* 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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procProcess32Next = kernel32.NewProc("Process32Next")
)

// hSnapshot (HANDLE), lppe (PROCESSENTRY32* in/out)
r1, _, err := procProcess32Next.Call(
	uintptr(hSnapshot),
	uintptr(lppe),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function Process32Next(
  hSnapshot: THandle;   // HANDLE
  lppe: Pointer   // PROCESSENTRY32* in/out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'Process32Next';

result := DllCall("KERNEL32\Process32Next"
    , "Ptr", hSnapshot   ; HANDLE
    , "Ptr", lppe   ; PROCESSENTRY32* in/out
    , "Int")   ; return: BOOL

●Process32Next(hSnapshot, lppe) = DLL("KERNEL32.dll", "bool Process32Next(void*, void*)")
# 呼び出し: Process32Next(hSnapshot, lppe)
# hSnapshot : HANDLE -> "void*"
# lppe : PROCESSENTRY32* 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)。