QueueUserWorkItem

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

BOOL QueueUserWorkItem(
    LPTHREAD_START_ROUTINE Function,
    void* Context,   // optional
    WORKER_THREAD_FLAGS Flags
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function QueueUserWorkItem(
    [Function] As IntPtr,   ' LPTHREAD_START_ROUTINE
    Context As IntPtr,   ' void* optional
    Flags As UInteger   ' WORKER_THREAD_FLAGS
) As Boolean
End Function

' Function : LPTHREAD_START_ROUTINE
' Context : void* optional
' Flags : WORKER_THREAD_FLAGS
Declare PtrSafe Function QueueUserWorkItem Lib "kernel32" ( _
    ByVal Function As LongPtr, _
    ByVal Context As LongPtr, _
    ByVal Flags 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

QueueUserWorkItem = ctypes.windll.kernel32.QueueUserWorkItem
QueueUserWorkItem.restype = wintypes.BOOL
QueueUserWorkItem.argtypes = [
    ctypes.c_void_p,  # Function : LPTHREAD_START_ROUTINE
    ctypes.POINTER(None),  # Context : void* optional
    wintypes.DWORD,  # Flags : WORKER_THREAD_FLAGS
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
QueueUserWorkItem = Fiddle::Function.new(
  lib['QueueUserWorkItem'],
  [
    Fiddle::TYPE_VOIDP,  # Function : LPTHREAD_START_ROUTINE
    Fiddle::TYPE_VOIDP,  # Context : void* optional
    -Fiddle::TYPE_INT,  # Flags : WORKER_THREAD_FLAGS
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn QueueUserWorkItem(
        Function: *const core::ffi::c_void,  // LPTHREAD_START_ROUTINE
        Context: *mut (),  // void* optional
        Flags: u32  // WORKER_THREAD_FLAGS
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool QueueUserWorkItem(IntPtr Function, IntPtr Context, uint Flags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_QueueUserWorkItem' -Namespace Win32 -PassThru
# $api::QueueUserWorkItem(Function, Context, Flags)

#uselib "KERNEL32.dll"
#func global QueueUserWorkItem "QueueUserWorkItem" sptr, sptr, sptr
; QueueUserWorkItem Function, Context, Flags   ; 戻り値は stat
; Function : LPTHREAD_START_ROUTINE -> "sptr"
; Context : void* optional -> "sptr"
; Flags : WORKER_THREAD_FLAGS -> "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 QueueUserWorkItem "QueueUserWorkItem" sptr, sptr, int
; res = QueueUserWorkItem(Function, Context, Flags)
; Function : LPTHREAD_START_ROUTINE -> "sptr"
; Context : void* optional -> "sptr"
; Flags : WORKER_THREAD_FLAGS -> "int"

; BOOL QueueUserWorkItem(LPTHREAD_START_ROUTINE Function, void* Context, WORKER_THREAD_FLAGS Flags)
#uselib "KERNEL32.dll"
#cfunc global QueueUserWorkItem "QueueUserWorkItem" intptr, intptr, int
; res = QueueUserWorkItem(Function, Context, Flags)
; Function : LPTHREAD_START_ROUTINE -> "intptr"
; Context : void* optional -> "intptr"
; Flags : WORKER_THREAD_FLAGS -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procQueueUserWorkItem = kernel32.NewProc("QueueUserWorkItem")
)

// Function (LPTHREAD_START_ROUTINE), Context (void* optional), Flags (WORKER_THREAD_FLAGS)
r1, _, err := procQueueUserWorkItem.Call(
	uintptr(Function),
	uintptr(Context),
	uintptr(Flags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function QueueUserWorkItem(
  Function: Pointer;   // LPTHREAD_START_ROUTINE
  Context: Pointer;   // void* optional
  Flags: DWORD   // WORKER_THREAD_FLAGS
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'QueueUserWorkItem';

result := DllCall("KERNEL32\QueueUserWorkItem"
    , "Ptr", Function   ; LPTHREAD_START_ROUTINE
    , "Ptr", Context   ; void* optional
    , "UInt", Flags   ; WORKER_THREAD_FLAGS
    , "Int")   ; return: BOOL

●QueueUserWorkItem(Function, Context, Flags) = DLL("KERNEL32.dll", "bool QueueUserWorkItem(void*, void*, dword)")
# 呼び出し: QueueUserWorkItem(Function, Context, Flags)
# Function : LPTHREAD_START_ROUTINE -> "void*"
# Context : void* optional -> "void*"
# Flags : WORKER_THREAD_FLAGS -> "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)。