HcnEnumerateLoadBalancers

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

HRESULT HcnEnumerateLoadBalancers(
    LPCWSTR Query,
    LPWSTR* LoadBalancer,
    LPWSTR* ErrorRecord   // optional
);

<DllImport("computenetwork.dll", ExactSpelling:=True)>
Public Shared Function HcnEnumerateLoadBalancers(
    <MarshalAs(UnmanagedType.LPWStr)> Query As String,   ' LPCWSTR
    LoadBalancer As IntPtr,   ' LPWSTR* out
    ErrorRecord As IntPtr   ' LPWSTR* optional, out
) As Integer
End Function

' Query : LPCWSTR
' LoadBalancer : LPWSTR* out
' ErrorRecord : LPWSTR* optional, out
Declare PtrSafe Function HcnEnumerateLoadBalancers Lib "computenetwork" ( _
    ByVal Query As LongPtr, _
    ByVal LoadBalancer As LongPtr, _
    ByVal ErrorRecord 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

HcnEnumerateLoadBalancers = ctypes.windll.computenetwork.HcnEnumerateLoadBalancers
HcnEnumerateLoadBalancers.restype = ctypes.c_int
HcnEnumerateLoadBalancers.argtypes = [
    wintypes.LPCWSTR,  # Query : LPCWSTR
    ctypes.c_void_p,  # LoadBalancer : LPWSTR* out
    ctypes.c_void_p,  # ErrorRecord : LPWSTR* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('computenetwork.dll')
HcnEnumerateLoadBalancers = Fiddle::Function.new(
  lib['HcnEnumerateLoadBalancers'],
  [
    Fiddle::TYPE_VOIDP,  # Query : LPCWSTR
    Fiddle::TYPE_VOIDP,  # LoadBalancer : LPWSTR* out
    Fiddle::TYPE_VOIDP,  # ErrorRecord : LPWSTR* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "computenetwork")]
extern "system" {
    fn HcnEnumerateLoadBalancers(
        Query: *const u16,  // LPCWSTR
        LoadBalancer: *mut *mut u16,  // LPWSTR* out
        ErrorRecord: *mut *mut u16  // LPWSTR* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("computenetwork.dll")]
public static extern int HcnEnumerateLoadBalancers([MarshalAs(UnmanagedType.LPWStr)] string Query, IntPtr LoadBalancer, IntPtr ErrorRecord);
"@
$api = Add-Type -MemberDefinition $sig -Name 'computenetwork_HcnEnumerateLoadBalancers' -Namespace Win32 -PassThru
# $api::HcnEnumerateLoadBalancers(Query, LoadBalancer, ErrorRecord)

#uselib "computenetwork.dll"
#func global HcnEnumerateLoadBalancers "HcnEnumerateLoadBalancers" sptr, sptr, sptr
; HcnEnumerateLoadBalancers Query, varptr(LoadBalancer), varptr(ErrorRecord)   ; 戻り値は stat
; Query : LPCWSTR -> "sptr"
; LoadBalancer : LPWSTR* out -> "sptr"
; ErrorRecord : LPWSTR* optional, out -> "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 "computenetwork.dll"
#cfunc global HcnEnumerateLoadBalancers "HcnEnumerateLoadBalancers" wstr, var, var
; res = HcnEnumerateLoadBalancers(Query, LoadBalancer, ErrorRecord)
; Query : LPCWSTR -> "wstr"
; LoadBalancer : LPWSTR* out -> "var"
; ErrorRecord : LPWSTR* optional, out -> "var"
; ※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。

; HRESULT HcnEnumerateLoadBalancers(LPCWSTR Query, LPWSTR* LoadBalancer, LPWSTR* ErrorRecord)
#uselib "computenetwork.dll"
#cfunc global HcnEnumerateLoadBalancers "HcnEnumerateLoadBalancers" wstr, var, var
; res = HcnEnumerateLoadBalancers(Query, LoadBalancer, ErrorRecord)
; Query : LPCWSTR -> "wstr"
; LoadBalancer : LPWSTR* out -> "var"
; ErrorRecord : LPWSTR* optional, out -> "var"
; ※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 (
	computenetwork = windows.NewLazySystemDLL("computenetwork.dll")
	procHcnEnumerateLoadBalancers = computenetwork.NewProc("HcnEnumerateLoadBalancers")
)

// Query (LPCWSTR), LoadBalancer (LPWSTR* out), ErrorRecord (LPWSTR* optional, out)
r1, _, err := procHcnEnumerateLoadBalancers.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(Query))),
	uintptr(LoadBalancer),
	uintptr(ErrorRecord),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function HcnEnumerateLoadBalancers(
  Query: PWideChar;   // LPCWSTR
  LoadBalancer: PPWideChar;   // LPWSTR* out
  ErrorRecord: PPWideChar   // LPWSTR* optional, out
): Integer; stdcall;
  external 'computenetwork.dll' name 'HcnEnumerateLoadBalancers';

result := DllCall("computenetwork\HcnEnumerateLoadBalancers"
    , "WStr", Query   ; LPCWSTR
    , "Ptr", LoadBalancer   ; LPWSTR* out
    , "Ptr", ErrorRecord   ; LPWSTR* optional, out
    , "Int")   ; return: HRESULT

●HcnEnumerateLoadBalancers(Query, LoadBalancer, ErrorRecord) = DLL("computenetwork.dll", "int HcnEnumerateLoadBalancers(char*, void*, void*)")
# 呼び出し: HcnEnumerateLoadBalancers(Query, LoadBalancer, ErrorRecord)
# Query : LPCWSTR -> "char*"
# LoadBalancer : LPWSTR* out -> "void*"
# ErrorRecord : LPWSTR* optional, out -> "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)。