OpenServiceA

// ADVAPI32.dll  (ANSI / -A)
#include <windows.h>

SC_HANDLE OpenServiceA(
    SC_HANDLE hSCManager,
    LPCSTR lpServiceName,
    DWORD dwDesiredAccess
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OpenServiceA(
    hSCManager As IntPtr,   ' SC_HANDLE
    <MarshalAs(UnmanagedType.LPStr)> lpServiceName As String,   ' LPCSTR
    dwDesiredAccess As UInteger   ' DWORD
) As IntPtr
End Function

' hSCManager : SC_HANDLE
' lpServiceName : LPCSTR
' dwDesiredAccess : DWORD
Declare PtrSafe Function OpenServiceA Lib "advapi32" ( _
    ByVal hSCManager As LongPtr, _
    ByVal lpServiceName As String, _
    ByVal dwDesiredAccess 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

OpenServiceA = ctypes.windll.advapi32.OpenServiceA
OpenServiceA.restype = ctypes.c_void_p
OpenServiceA.argtypes = [
    wintypes.HANDLE,  # hSCManager : SC_HANDLE
    wintypes.LPCSTR,  # lpServiceName : LPCSTR
    wintypes.DWORD,  # dwDesiredAccess : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
OpenServiceA = Fiddle::Function.new(
  lib['OpenServiceA'],
  [
    Fiddle::TYPE_VOIDP,  # hSCManager : SC_HANDLE
    Fiddle::TYPE_VOIDP,  # lpServiceName : LPCSTR
    -Fiddle::TYPE_INT,  # dwDesiredAccess : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "advapi32")]
extern "system" {
    fn OpenServiceA(
        hSCManager: *mut core::ffi::c_void,  // SC_HANDLE
        lpServiceName: *const u8,  // LPCSTR
        dwDesiredAccess: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVAPI32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern IntPtr OpenServiceA(IntPtr hSCManager, [MarshalAs(UnmanagedType.LPStr)] string lpServiceName, uint dwDesiredAccess);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_OpenServiceA' -Namespace Win32 -PassThru
# $api::OpenServiceA(hSCManager, lpServiceName, dwDesiredAccess)

#uselib "ADVAPI32.dll"
#func global OpenServiceA "OpenServiceA" sptr, sptr, sptr
; OpenServiceA hSCManager, lpServiceName, dwDesiredAccess   ; 戻り値は stat
; hSCManager : SC_HANDLE -> "sptr"
; lpServiceName : LPCSTR -> "sptr"
; dwDesiredAccess : 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 "ADVAPI32.dll"
#cfunc global OpenServiceA "OpenServiceA" sptr, str, int
; res = OpenServiceA(hSCManager, lpServiceName, dwDesiredAccess)
; hSCManager : SC_HANDLE -> "sptr"
; lpServiceName : LPCSTR -> "str"
; dwDesiredAccess : DWORD -> "int"

; SC_HANDLE OpenServiceA(SC_HANDLE hSCManager, LPCSTR lpServiceName, DWORD dwDesiredAccess)
#uselib "ADVAPI32.dll"
#cfunc global OpenServiceA "OpenServiceA" intptr, str, int
; res = OpenServiceA(hSCManager, lpServiceName, dwDesiredAccess)
; hSCManager : SC_HANDLE -> "intptr"
; lpServiceName : LPCSTR -> "str"
; dwDesiredAccess : DWORD -> "int"

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

var (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procOpenServiceA = advapi32.NewProc("OpenServiceA")
)

// hSCManager (SC_HANDLE), lpServiceName (LPCSTR), dwDesiredAccess (DWORD)
r1, _, err := procOpenServiceA.Call(
	uintptr(hSCManager),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpServiceName))),
	uintptr(dwDesiredAccess),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SC_HANDLE

function OpenServiceA(
  hSCManager: THandle;   // SC_HANDLE
  lpServiceName: PAnsiChar;   // LPCSTR
  dwDesiredAccess: DWORD   // DWORD
): THandle; stdcall;
  external 'ADVAPI32.dll' name 'OpenServiceA';

result := DllCall("ADVAPI32\OpenServiceA"
    , "Ptr", hSCManager   ; SC_HANDLE
    , "AStr", lpServiceName   ; LPCSTR
    , "UInt", dwDesiredAccess   ; DWORD
    , "Ptr")   ; return: SC_HANDLE

●OpenServiceA(hSCManager, lpServiceName, dwDesiredAccess) = DLL("ADVAPI32.dll", "void* OpenServiceA(void*, char*, dword)")
# 呼び出し: OpenServiceA(hSCManager, lpServiceName, dwDesiredAccess)
# hSCManager : SC_HANDLE -> "void*"
# lpServiceName : LPCSTR -> "char*"
# dwDesiredAccess : 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)。

const std = @import("std");

extern "advapi32" fn OpenServiceA(
    hSCManager: ?*anyopaque, // SC_HANDLE
    lpServiceName: [*c]const u8, // LPCSTR
    dwDesiredAccess: u32 // DWORD
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc OpenServiceA(
    hSCManager: pointer,  # SC_HANDLE
    lpServiceName: cstring,  # LPCSTR
    dwDesiredAccess: uint32  # DWORD
): pointer {.importc: "OpenServiceA", stdcall, dynlib: "ADVAPI32.dll".}

pragma(lib, "advapi32");
extern(Windows)
void* OpenServiceA(
    void* hSCManager,   // SC_HANDLE
    const(char)* lpServiceName,   // LPCSTR
    uint dwDesiredAccess   // DWORD
);

ccall((:OpenServiceA, "ADVAPI32.dll"), stdcall, Ptr{Cvoid},
      (Ptr{Cvoid}, Cstring, UInt32),
      hSCManager, lpServiceName, dwDesiredAccess)
# hSCManager : SC_HANDLE -> Ptr{Cvoid}
# lpServiceName : LPCSTR -> Cstring
# dwDesiredAccess : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* OpenServiceA(
    void* hSCManager,
    const char* lpServiceName,
    uint32_t dwDesiredAccess);
]]
local advapi32 = ffi.load("advapi32")
-- advapi32.OpenServiceA(hSCManager, lpServiceName, dwDesiredAccess)
-- hSCManager : SC_HANDLE
-- lpServiceName : LPCSTR
-- dwDesiredAccess : DWORD
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('ADVAPI32.dll');
const OpenServiceA = lib.func('__stdcall', 'OpenServiceA', 'void *', ['void *', 'str', 'uint32_t']);
// OpenServiceA(hSCManager, lpServiceName, dwDesiredAccess)
// hSCManager : SC_HANDLE -> 'void *'
// lpServiceName : LPCSTR -> 'str'
// dwDesiredAccess : DWORD -> 'uint32_t'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("ADVAPI32.dll", {
  OpenServiceA: { parameters: ["pointer", "buffer", "u32"], result: "pointer" },
});
// lib.symbols.OpenServiceA(hSCManager, lpServiceName, dwDesiredAccess)
// hSCManager : SC_HANDLE -> "pointer"
// lpServiceName : LPCSTR -> "buffer"
// dwDesiredAccess : DWORD -> "u32"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
void* OpenServiceA(
    void* hSCManager,
    const char* lpServiceName,
    uint32_t dwDesiredAccess);
C, "ADVAPI32.dll");
// $ffi->OpenServiceA(hSCManager, lpServiceName, dwDesiredAccess);
// hSCManager : SC_HANDLE
// lpServiceName : LPCSTR
// dwDesiredAccess : DWORD
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Advapi32 extends StdCallLibrary {
    Advapi32 INSTANCE = Native.load("advapi32", Advapi32.class, W32APIOptions.ASCII_OPTIONS);
    Pointer OpenServiceA(
        Pointer hSCManager,   // SC_HANDLE
        String lpServiceName,   // LPCSTR
        int dwDesiredAccess   // DWORD
    );
}

@[Link("advapi32")]
lib LibADVAPI32
  fun OpenServiceA = OpenServiceA(
    hSCManager : Void*,   # SC_HANDLE
    lpServiceName : UInt8*,   # LPCSTR
    dwDesiredAccess : UInt32   # DWORD
  ) : Void*
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef OpenServiceANative = Pointer<Void> Function(Pointer<Void>, Pointer<Utf8>, Uint32);
typedef OpenServiceADart = Pointer<Void> Function(Pointer<Void>, Pointer<Utf8>, int);
final OpenServiceA = DynamicLibrary.open('ADVAPI32.dll')
    .lookupFunction<OpenServiceANative, OpenServiceADart>('OpenServiceA');
// hSCManager : SC_HANDLE -> Pointer<Void>
// lpServiceName : LPCSTR -> Pointer<Utf8>
// dwDesiredAccess : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function OpenServiceA(
  hSCManager: THandle;   // SC_HANDLE
  lpServiceName: PAnsiChar;   // LPCSTR
  dwDesiredAccess: DWORD   // DWORD
): THandle; stdcall;
  external 'ADVAPI32.dll' name 'OpenServiceA';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "OpenServiceA"
  c_OpenServiceA :: Ptr () -> CString -> Word32 -> IO (Ptr ())
-- hSCManager : SC_HANDLE -> Ptr ()
-- lpServiceName : LPCSTR -> CString
-- dwDesiredAccess : DWORD -> Word32
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let openservicea =
  foreign "OpenServiceA"
    ((ptr void) @-> string @-> uint32_t @-> returning (ptr void))
(* hSCManager : SC_HANDLE -> (ptr void) *)
(* lpServiceName : LPCSTR -> string *)
(* dwDesiredAccess : DWORD -> uint32_t *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library advapi32 (t "ADVAPI32.dll"))
(cffi:use-foreign-library advapi32)

(cffi:defcfun ("OpenServiceA" open-service-a :convention :stdcall) :pointer
  (h-scmanager :pointer)   ; SC_HANDLE
  (lp-service-name :string)   ; LPCSTR
  (dw-desired-access :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $OpenServiceA = Win32::API::More->new('ADVAPI32',
    'HANDLE OpenServiceA(HANDLE hSCManager, LPCSTR lpServiceName, DWORD dwDesiredAccess)');
# my $ret = $OpenServiceA->Call($hSCManager, $lpServiceName, $dwDesiredAccess);
# hSCManager : SC_HANDLE -> HANDLE
# lpServiceName : LPCSTR -> LPCSTR
# dwDesiredAccess : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。