CreateClusterGroupEx

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

HGROUP CreateClusterGroupEx(
    HCLUSTER hCluster,
    LPCWSTR lpszGroupName,
    CLUSTER_CREATE_GROUP_INFO* pGroupInfo   // optional
);

<DllImport("CLUSAPI.dll", ExactSpelling:=True)>
Public Shared Function CreateClusterGroupEx(
    hCluster As IntPtr,   ' HCLUSTER
    <MarshalAs(UnmanagedType.LPWStr)> lpszGroupName As String,   ' LPCWSTR
    pGroupInfo As IntPtr   ' CLUSTER_CREATE_GROUP_INFO* optional
) As IntPtr
End Function

' hCluster : HCLUSTER
' lpszGroupName : LPCWSTR
' pGroupInfo : CLUSTER_CREATE_GROUP_INFO* optional
Declare PtrSafe Function CreateClusterGroupEx Lib "clusapi" ( _
    ByVal hCluster As LongPtr, _
    ByVal lpszGroupName As LongPtr, _
    ByVal pGroupInfo As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CreateClusterGroupEx = ctypes.windll.clusapi.CreateClusterGroupEx
CreateClusterGroupEx.restype = ctypes.c_ssize_t
CreateClusterGroupEx.argtypes = [
    ctypes.c_ssize_t,  # hCluster : HCLUSTER
    wintypes.LPCWSTR,  # lpszGroupName : LPCWSTR
    ctypes.c_void_p,  # pGroupInfo : CLUSTER_CREATE_GROUP_INFO* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CLUSAPI.dll')
CreateClusterGroupEx = Fiddle::Function.new(
  lib['CreateClusterGroupEx'],
  [
    Fiddle::TYPE_INTPTR_T,  # hCluster : HCLUSTER
    Fiddle::TYPE_VOIDP,  # lpszGroupName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pGroupInfo : CLUSTER_CREATE_GROUP_INFO* optional
  ],
  Fiddle::TYPE_INTPTR_T)

#[link(name = "clusapi")]
extern "system" {
    fn CreateClusterGroupEx(
        hCluster: isize,  // HCLUSTER
        lpszGroupName: *const u16,  // LPCWSTR
        pGroupInfo: *mut CLUSTER_CREATE_GROUP_INFO  // CLUSTER_CREATE_GROUP_INFO* optional
    ) -> isize;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CLUSAPI.dll")]
public static extern IntPtr CreateClusterGroupEx(IntPtr hCluster, [MarshalAs(UnmanagedType.LPWStr)] string lpszGroupName, IntPtr pGroupInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CLUSAPI_CreateClusterGroupEx' -Namespace Win32 -PassThru
# $api::CreateClusterGroupEx(hCluster, lpszGroupName, pGroupInfo)

#uselib "CLUSAPI.dll"
#func global CreateClusterGroupEx "CreateClusterGroupEx" sptr, sptr, sptr
; CreateClusterGroupEx hCluster, lpszGroupName, varptr(pGroupInfo)   ; 戻り値は stat
; hCluster : HCLUSTER -> "sptr"
; lpszGroupName : LPCWSTR -> "sptr"
; pGroupInfo : CLUSTER_CREATE_GROUP_INFO* 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 "CLUSAPI.dll"
#cfunc global CreateClusterGroupEx "CreateClusterGroupEx" sptr, wstr, var
; res = CreateClusterGroupEx(hCluster, lpszGroupName, pGroupInfo)
; hCluster : HCLUSTER -> "sptr"
; lpszGroupName : LPCWSTR -> "wstr"
; pGroupInfo : CLUSTER_CREATE_GROUP_INFO* optional -> "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。

; HGROUP CreateClusterGroupEx(HCLUSTER hCluster, LPCWSTR lpszGroupName, CLUSTER_CREATE_GROUP_INFO* pGroupInfo)
#uselib "CLUSAPI.dll"
#cfunc global CreateClusterGroupEx "CreateClusterGroupEx" intptr, wstr, var
; res = CreateClusterGroupEx(hCluster, lpszGroupName, pGroupInfo)
; hCluster : HCLUSTER -> "intptr"
; lpszGroupName : LPCWSTR -> "wstr"
; pGroupInfo : CLUSTER_CREATE_GROUP_INFO* optional -> "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 (
	clusapi = windows.NewLazySystemDLL("CLUSAPI.dll")
	procCreateClusterGroupEx = clusapi.NewProc("CreateClusterGroupEx")
)

// hCluster (HCLUSTER), lpszGroupName (LPCWSTR), pGroupInfo (CLUSTER_CREATE_GROUP_INFO* optional)
r1, _, err := procCreateClusterGroupEx.Call(
	uintptr(hCluster),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszGroupName))),
	uintptr(pGroupInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HGROUP

function CreateClusterGroupEx(
  hCluster: NativeInt;   // HCLUSTER
  lpszGroupName: PWideChar;   // LPCWSTR
  pGroupInfo: Pointer   // CLUSTER_CREATE_GROUP_INFO* optional
): NativeInt; stdcall;
  external 'CLUSAPI.dll' name 'CreateClusterGroupEx';

result := DllCall("CLUSAPI\CreateClusterGroupEx"
    , "Ptr", hCluster   ; HCLUSTER
    , "WStr", lpszGroupName   ; LPCWSTR
    , "Ptr", pGroupInfo   ; CLUSTER_CREATE_GROUP_INFO* optional
    , "Ptr")   ; return: HGROUP

●CreateClusterGroupEx(hCluster, lpszGroupName, pGroupInfo) = DLL("CLUSAPI.dll", "int CreateClusterGroupEx(int, char*, void*)")
# 呼び出し: CreateClusterGroupEx(hCluster, lpszGroupName, pGroupInfo)
# hCluster : HCLUSTER -> "int"
# lpszGroupName : LPCWSTR -> "char*"
# pGroupInfo : CLUSTER_CREATE_GROUP_INFO* 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)。