InitOnceComplete

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

BOOL InitOnceComplete(
    INIT_ONCE* lpInitOnce,
    DWORD dwFlags,
    void* lpContext   // optional
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function InitOnceComplete(
    lpInitOnce As IntPtr,   ' INIT_ONCE* in/out
    dwFlags As UInteger,   ' DWORD
    lpContext As IntPtr   ' void* optional
) As Boolean
End Function

' lpInitOnce : INIT_ONCE* in/out
' dwFlags : DWORD
' lpContext : void* optional
Declare PtrSafe Function InitOnceComplete Lib "kernel32" ( _
    ByVal lpInitOnce As LongPtr, _
    ByVal dwFlags As Long, _
    ByVal lpContext 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

InitOnceComplete = ctypes.windll.kernel32.InitOnceComplete
InitOnceComplete.restype = wintypes.BOOL
InitOnceComplete.argtypes = [
    ctypes.c_void_p,  # lpInitOnce : INIT_ONCE* in/out
    wintypes.DWORD,  # dwFlags : DWORD
    ctypes.POINTER(None),  # lpContext : void* optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
InitOnceComplete = Fiddle::Function.new(
  lib['InitOnceComplete'],
  [
    Fiddle::TYPE_VOIDP,  # lpInitOnce : INIT_ONCE* in/out
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # lpContext : void* optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn InitOnceComplete(
        lpInitOnce: *mut INIT_ONCE,  // INIT_ONCE* in/out
        dwFlags: u32,  // DWORD
        lpContext: *mut ()  // void* optional
    ) -> 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 InitOnceComplete(IntPtr lpInitOnce, uint dwFlags, IntPtr lpContext);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_InitOnceComplete' -Namespace Win32 -PassThru
# $api::InitOnceComplete(lpInitOnce, dwFlags, lpContext)

#uselib "KERNEL32.dll"
#func global InitOnceComplete "InitOnceComplete" sptr, sptr, sptr
; InitOnceComplete varptr(lpInitOnce), dwFlags, lpContext   ; 戻り値は stat
; lpInitOnce : INIT_ONCE* in/out -> "sptr"
; dwFlags : DWORD -> "sptr"
; lpContext : void* optional -> "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 InitOnceComplete "InitOnceComplete" var, int, sptr
; res = InitOnceComplete(lpInitOnce, dwFlags, lpContext)
; lpInitOnce : INIT_ONCE* in/out -> "var"
; dwFlags : DWORD -> "int"
; lpContext : void* optional -> "sptr"
; ※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 InitOnceComplete(INIT_ONCE* lpInitOnce, DWORD dwFlags, void* lpContext)
#uselib "KERNEL32.dll"
#cfunc global InitOnceComplete "InitOnceComplete" var, int, intptr
; res = InitOnceComplete(lpInitOnce, dwFlags, lpContext)
; lpInitOnce : INIT_ONCE* in/out -> "var"
; dwFlags : DWORD -> "int"
; lpContext : void* optional -> "intptr"
; ※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。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procInitOnceComplete = kernel32.NewProc("InitOnceComplete")
)

// lpInitOnce (INIT_ONCE* in/out), dwFlags (DWORD), lpContext (void* optional)
r1, _, err := procInitOnceComplete.Call(
	uintptr(lpInitOnce),
	uintptr(dwFlags),
	uintptr(lpContext),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function InitOnceComplete(
  lpInitOnce: Pointer;   // INIT_ONCE* in/out
  dwFlags: DWORD;   // DWORD
  lpContext: Pointer   // void* optional
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'InitOnceComplete';

result := DllCall("KERNEL32\InitOnceComplete"
    , "Ptr", lpInitOnce   ; INIT_ONCE* in/out
    , "UInt", dwFlags   ; DWORD
    , "Ptr", lpContext   ; void* optional
    , "Int")   ; return: BOOL

●InitOnceComplete(lpInitOnce, dwFlags, lpContext) = DLL("KERNEL32.dll", "bool InitOnceComplete(void*, dword, void*)")
# 呼び出し: InitOnceComplete(lpInitOnce, dwFlags, lpContext)
# lpInitOnce : INIT_ONCE* in/out -> "void*"
# dwFlags : DWORD -> "dword"
# lpContext : void* optional -> "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)。