OpenSCManagerW

// ADVAPI32.dll  (Unicode / -W)
#include <windows.h>

SC_HANDLE OpenSCManagerW(
    LPCWSTR lpMachineName,   // optional
    LPCWSTR lpDatabaseName,   // optional
    DWORD dwDesiredAccess
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OpenSCManagerW(
    <MarshalAs(UnmanagedType.LPWStr)> lpMachineName As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpDatabaseName As String,   ' LPCWSTR optional
    dwDesiredAccess As UInteger   ' DWORD
) As IntPtr
End Function

' lpMachineName : LPCWSTR optional
' lpDatabaseName : LPCWSTR optional
' dwDesiredAccess : DWORD
Declare PtrSafe Function OpenSCManagerW Lib "advapi32" ( _
    ByVal lpMachineName As LongPtr, _
    ByVal lpDatabaseName As LongPtr, _
    ByVal dwDesiredAccess As Long) As LongPtr
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

OpenSCManagerW = ctypes.windll.advapi32.OpenSCManagerW
OpenSCManagerW.restype = ctypes.c_void_p
OpenSCManagerW.argtypes = [
    wintypes.LPCWSTR,  # lpMachineName : LPCWSTR optional
    wintypes.LPCWSTR,  # lpDatabaseName : LPCWSTR optional
    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')
OpenSCManagerW = Fiddle::Function.new(
  lib['OpenSCManagerW'],
  [
    Fiddle::TYPE_VOIDP,  # lpMachineName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # lpDatabaseName : LPCWSTR optional
    -Fiddle::TYPE_INT,  # dwDesiredAccess : DWORD
  ],
  Fiddle::TYPE_VOIDP)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advapi32")]
extern "system" {
    fn OpenSCManagerW(
        lpMachineName: *const u16,  // LPCWSTR optional
        lpDatabaseName: *const u16,  // LPCWSTR optional
        dwDesiredAccess: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern IntPtr OpenSCManagerW([MarshalAs(UnmanagedType.LPWStr)] string lpMachineName, [MarshalAs(UnmanagedType.LPWStr)] string lpDatabaseName, uint dwDesiredAccess);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_OpenSCManagerW' -Namespace Win32 -PassThru
# $api::OpenSCManagerW(lpMachineName, lpDatabaseName, dwDesiredAccess)

#uselib "ADVAPI32.dll"
#func global OpenSCManagerW "OpenSCManagerW" wptr, wptr, wptr
; OpenSCManagerW lpMachineName, lpDatabaseName, dwDesiredAccess   ; 戻り値は stat
; lpMachineName : LPCWSTR optional -> "wptr"
; lpDatabaseName : LPCWSTR optional -> "wptr"
; dwDesiredAccess : DWORD -> "wptr"
; ※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 OpenSCManagerW "OpenSCManagerW" wstr, wstr, int
; res = OpenSCManagerW(lpMachineName, lpDatabaseName, dwDesiredAccess)
; lpMachineName : LPCWSTR optional -> "wstr"
; lpDatabaseName : LPCWSTR optional -> "wstr"
; dwDesiredAccess : DWORD -> "int"

; SC_HANDLE OpenSCManagerW(LPCWSTR lpMachineName, LPCWSTR lpDatabaseName, DWORD dwDesiredAccess)
#uselib "ADVAPI32.dll"
#cfunc global OpenSCManagerW "OpenSCManagerW" wstr, wstr, int
; res = OpenSCManagerW(lpMachineName, lpDatabaseName, dwDesiredAccess)
; lpMachineName : LPCWSTR optional -> "wstr"
; lpDatabaseName : LPCWSTR optional -> "wstr"
; dwDesiredAccess : DWORD -> "int"

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

var (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procOpenSCManagerW = advapi32.NewProc("OpenSCManagerW")
)

// lpMachineName (LPCWSTR optional), lpDatabaseName (LPCWSTR optional), dwDesiredAccess (DWORD)
r1, _, err := procOpenSCManagerW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpMachineName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpDatabaseName))),
	uintptr(dwDesiredAccess),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SC_HANDLE

function OpenSCManagerW(
  lpMachineName: PWideChar;   // LPCWSTR optional
  lpDatabaseName: PWideChar;   // LPCWSTR optional
  dwDesiredAccess: DWORD   // DWORD
): THandle; stdcall;
  external 'ADVAPI32.dll' name 'OpenSCManagerW';

result := DllCall("ADVAPI32\OpenSCManagerW"
    , "WStr", lpMachineName   ; LPCWSTR optional
    , "WStr", lpDatabaseName   ; LPCWSTR optional
    , "UInt", dwDesiredAccess   ; DWORD
    , "Ptr")   ; return: SC_HANDLE

●OpenSCManagerW(lpMachineName, lpDatabaseName, dwDesiredAccess) = DLL("ADVAPI32.dll", "void* OpenSCManagerW(char*, char*, dword)")
# 呼び出し: OpenSCManagerW(lpMachineName, lpDatabaseName, dwDesiredAccess)
# lpMachineName : LPCWSTR optional -> "char*"
# lpDatabaseName : LPCWSTR optional -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。