CreateToolhelp32Snapshot

// KERNEL32.dll
#include <windows.h>

HANDLE CreateToolhelp32Snapshot(
    CREATE_TOOLHELP_SNAPSHOT_FLAGS dwFlags,
    DWORD th32ProcessID
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CreateToolhelp32Snapshot(
    dwFlags As UInteger,   ' CREATE_TOOLHELP_SNAPSHOT_FLAGS
    th32ProcessID As UInteger   ' DWORD
) As IntPtr
End Function

' dwFlags : CREATE_TOOLHELP_SNAPSHOT_FLAGS
' th32ProcessID : DWORD
Declare PtrSafe Function CreateToolhelp32Snapshot Lib "kernel32" ( _
    ByVal dwFlags As Long, _
    ByVal th32ProcessID As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CreateToolhelp32Snapshot = ctypes.windll.kernel32.CreateToolhelp32Snapshot
CreateToolhelp32Snapshot.restype = ctypes.c_void_p
CreateToolhelp32Snapshot.argtypes = [
    wintypes.DWORD,  # dwFlags : CREATE_TOOLHELP_SNAPSHOT_FLAGS
    wintypes.DWORD,  # th32ProcessID : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
CreateToolhelp32Snapshot = Fiddle::Function.new(
  lib['CreateToolhelp32Snapshot'],
  [
    -Fiddle::TYPE_INT,  # dwFlags : CREATE_TOOLHELP_SNAPSHOT_FLAGS
    -Fiddle::TYPE_INT,  # th32ProcessID : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn CreateToolhelp32Snapshot(
        dwFlags: u32,  // CREATE_TOOLHELP_SNAPSHOT_FLAGS
        th32ProcessID: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern IntPtr CreateToolhelp32Snapshot(uint dwFlags, uint th32ProcessID);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_CreateToolhelp32Snapshot' -Namespace Win32 -PassThru
# $api::CreateToolhelp32Snapshot(dwFlags, th32ProcessID)

#uselib "KERNEL32.dll"
#func global CreateToolhelp32Snapshot "CreateToolhelp32Snapshot" sptr, sptr
; CreateToolhelp32Snapshot dwFlags, th32ProcessID   ; 戻り値は stat
; dwFlags : CREATE_TOOLHELP_SNAPSHOT_FLAGS -> "sptr"
; th32ProcessID : DWORD -> "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 "KERNEL32.dll"
#cfunc global CreateToolhelp32Snapshot "CreateToolhelp32Snapshot" int, int
; res = CreateToolhelp32Snapshot(dwFlags, th32ProcessID)
; dwFlags : CREATE_TOOLHELP_SNAPSHOT_FLAGS -> "int"
; th32ProcessID : DWORD -> "int"

; HANDLE CreateToolhelp32Snapshot(CREATE_TOOLHELP_SNAPSHOT_FLAGS dwFlags, DWORD th32ProcessID)
#uselib "KERNEL32.dll"
#cfunc global CreateToolhelp32Snapshot "CreateToolhelp32Snapshot" int, int
; res = CreateToolhelp32Snapshot(dwFlags, th32ProcessID)
; dwFlags : CREATE_TOOLHELP_SNAPSHOT_FLAGS -> "int"
; th32ProcessID : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procCreateToolhelp32Snapshot = kernel32.NewProc("CreateToolhelp32Snapshot")
)

// dwFlags (CREATE_TOOLHELP_SNAPSHOT_FLAGS), th32ProcessID (DWORD)
r1, _, err := procCreateToolhelp32Snapshot.Call(
	uintptr(dwFlags),
	uintptr(th32ProcessID),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function CreateToolhelp32Snapshot(
  dwFlags: DWORD;   // CREATE_TOOLHELP_SNAPSHOT_FLAGS
  th32ProcessID: DWORD   // DWORD
): THandle; stdcall;
  external 'KERNEL32.dll' name 'CreateToolhelp32Snapshot';

result := DllCall("KERNEL32\CreateToolhelp32Snapshot"
    , "UInt", dwFlags   ; CREATE_TOOLHELP_SNAPSHOT_FLAGS
    , "UInt", th32ProcessID   ; DWORD
    , "Ptr")   ; return: HANDLE

●CreateToolhelp32Snapshot(dwFlags, th32ProcessID) = DLL("KERNEL32.dll", "void* CreateToolhelp32Snapshot(dword, dword)")
# 呼び出し: CreateToolhelp32Snapshot(dwFlags, th32ProcessID)
# dwFlags : CREATE_TOOLHELP_SNAPSHOT_FLAGS -> "dword"
# th32ProcessID : DWORD -> "dword"
# 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)。