ClusterGroupEnum

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

DWORD ClusterGroupEnum(
    HGROUPENUM hGroupEnum,
    DWORD dwIndex,
    DWORD* lpdwType,
    LPWSTR lpszResourceName,
    DWORD* lpcchName
);

<DllImport("CLUSAPI.dll", ExactSpelling:=True)>
Public Shared Function ClusterGroupEnum(
    hGroupEnum As IntPtr,   ' HGROUPENUM
    dwIndex As UInteger,   ' DWORD
    <Out> ByRef lpdwType As UInteger,   ' DWORD* out
    <MarshalAs(UnmanagedType.LPWStr)> lpszResourceName As System.Text.StringBuilder,   ' LPWSTR out
    ByRef lpcchName As UInteger   ' DWORD* in/out
) As UInteger
End Function

' hGroupEnum : HGROUPENUM
' dwIndex : DWORD
' lpdwType : DWORD* out
' lpszResourceName : LPWSTR out
' lpcchName : DWORD* in/out
Declare PtrSafe Function ClusterGroupEnum Lib "clusapi" ( _
    ByVal hGroupEnum As LongPtr, _
    ByVal dwIndex As Long, _
    ByRef lpdwType As Long, _
    ByVal lpszResourceName As LongPtr, _
    ByRef lpcchName As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ClusterGroupEnum = ctypes.windll.clusapi.ClusterGroupEnum
ClusterGroupEnum.restype = wintypes.DWORD
ClusterGroupEnum.argtypes = [
    ctypes.c_ssize_t,  # hGroupEnum : HGROUPENUM
    wintypes.DWORD,  # dwIndex : DWORD
    ctypes.POINTER(wintypes.DWORD),  # lpdwType : DWORD* out
    wintypes.LPWSTR,  # lpszResourceName : LPWSTR out
    ctypes.POINTER(wintypes.DWORD),  # lpcchName : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CLUSAPI.dll')
ClusterGroupEnum = Fiddle::Function.new(
  lib['ClusterGroupEnum'],
  [
    Fiddle::TYPE_INTPTR_T,  # hGroupEnum : HGROUPENUM
    -Fiddle::TYPE_INT,  # dwIndex : DWORD
    Fiddle::TYPE_VOIDP,  # lpdwType : DWORD* out
    Fiddle::TYPE_VOIDP,  # lpszResourceName : LPWSTR out
    Fiddle::TYPE_VOIDP,  # lpcchName : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "clusapi")]
extern "system" {
    fn ClusterGroupEnum(
        hGroupEnum: isize,  // HGROUPENUM
        dwIndex: u32,  // DWORD
        lpdwType: *mut u32,  // DWORD* out
        lpszResourceName: *mut u16,  // LPWSTR out
        lpcchName: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CLUSAPI.dll")]
public static extern uint ClusterGroupEnum(IntPtr hGroupEnum, uint dwIndex, out uint lpdwType, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpszResourceName, ref uint lpcchName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CLUSAPI_ClusterGroupEnum' -Namespace Win32 -PassThru
# $api::ClusterGroupEnum(hGroupEnum, dwIndex, lpdwType, lpszResourceName, lpcchName)

#uselib "CLUSAPI.dll"
#func global ClusterGroupEnum "ClusterGroupEnum" sptr, sptr, sptr, sptr, sptr
; ClusterGroupEnum hGroupEnum, dwIndex, varptr(lpdwType), varptr(lpszResourceName), varptr(lpcchName)   ; 戻り値は stat
; hGroupEnum : HGROUPENUM -> "sptr"
; dwIndex : DWORD -> "sptr"
; lpdwType : DWORD* out -> "sptr"
; lpszResourceName : LPWSTR out -> "sptr"
; lpcchName : DWORD* in/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 "CLUSAPI.dll"
#cfunc global ClusterGroupEnum "ClusterGroupEnum" sptr, int, var, var, var
; res = ClusterGroupEnum(hGroupEnum, dwIndex, lpdwType, lpszResourceName, lpcchName)
; hGroupEnum : HGROUPENUM -> "sptr"
; dwIndex : DWORD -> "int"
; lpdwType : DWORD* out -> "var"
; lpszResourceName : LPWSTR out -> "var"
; lpcchName : DWORD* in/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。

; DWORD ClusterGroupEnum(HGROUPENUM hGroupEnum, DWORD dwIndex, DWORD* lpdwType, LPWSTR lpszResourceName, DWORD* lpcchName)
#uselib "CLUSAPI.dll"
#cfunc global ClusterGroupEnum "ClusterGroupEnum" intptr, int, var, var, var
; res = ClusterGroupEnum(hGroupEnum, dwIndex, lpdwType, lpszResourceName, lpcchName)
; hGroupEnum : HGROUPENUM -> "intptr"
; dwIndex : DWORD -> "int"
; lpdwType : DWORD* out -> "var"
; lpszResourceName : LPWSTR out -> "var"
; lpcchName : DWORD* in/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 (
	clusapi = windows.NewLazySystemDLL("CLUSAPI.dll")
	procClusterGroupEnum = clusapi.NewProc("ClusterGroupEnum")
)

// hGroupEnum (HGROUPENUM), dwIndex (DWORD), lpdwType (DWORD* out), lpszResourceName (LPWSTR out), lpcchName (DWORD* in/out)
r1, _, err := procClusterGroupEnum.Call(
	uintptr(hGroupEnum),
	uintptr(dwIndex),
	uintptr(lpdwType),
	uintptr(lpszResourceName),
	uintptr(lpcchName),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function ClusterGroupEnum(
  hGroupEnum: NativeInt;   // HGROUPENUM
  dwIndex: DWORD;   // DWORD
  lpdwType: Pointer;   // DWORD* out
  lpszResourceName: PWideChar;   // LPWSTR out
  lpcchName: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'CLUSAPI.dll' name 'ClusterGroupEnum';

result := DllCall("CLUSAPI\ClusterGroupEnum"
    , "Ptr", hGroupEnum   ; HGROUPENUM
    , "UInt", dwIndex   ; DWORD
    , "Ptr", lpdwType   ; DWORD* out
    , "Ptr", lpszResourceName   ; LPWSTR out
    , "Ptr", lpcchName   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●ClusterGroupEnum(hGroupEnum, dwIndex, lpdwType, lpszResourceName, lpcchName) = DLL("CLUSAPI.dll", "dword ClusterGroupEnum(int, dword, void*, char*, void*)")
# 呼び出し: ClusterGroupEnum(hGroupEnum, dwIndex, lpdwType, lpszResourceName, lpcchName)
# hGroupEnum : HGROUPENUM -> "int"
# dwIndex : DWORD -> "dword"
# lpdwType : DWORD* out -> "void*"
# lpszResourceName : LPWSTR out -> "char*"
# lpcchName : DWORD* in/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)。