OpenCluster

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

HCLUSTER OpenCluster(
    LPCWSTR lpszClusterName   // optional
);

<DllImport("CLUSAPI.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OpenCluster(
    <MarshalAs(UnmanagedType.LPWStr)> lpszClusterName As String   ' LPCWSTR optional
) As IntPtr
End Function

' lpszClusterName : LPCWSTR optional
Declare PtrSafe Function OpenCluster Lib "clusapi" ( _
    ByVal lpszClusterName 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

OpenCluster = ctypes.windll.clusapi.OpenCluster
OpenCluster.restype = ctypes.c_ssize_t
OpenCluster.argtypes = [
    wintypes.LPCWSTR,  # lpszClusterName : LPCWSTR optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CLUSAPI.dll')
OpenCluster = Fiddle::Function.new(
  lib['OpenCluster'],
  [
    Fiddle::TYPE_VOIDP,  # lpszClusterName : LPCWSTR optional
  ],
  Fiddle::TYPE_INTPTR_T)

#[link(name = "clusapi")]
extern "system" {
    fn OpenCluster(
        lpszClusterName: *const u16  // LPCWSTR optional
    ) -> isize;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CLUSAPI.dll", SetLastError = true)]
public static extern IntPtr OpenCluster([MarshalAs(UnmanagedType.LPWStr)] string lpszClusterName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CLUSAPI_OpenCluster' -Namespace Win32 -PassThru
# $api::OpenCluster(lpszClusterName)

#uselib "CLUSAPI.dll"
#func global OpenCluster "OpenCluster" sptr
; OpenCluster lpszClusterName   ; 戻り値は stat
; lpszClusterName : LPCWSTR 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 OpenCluster "OpenCluster" wstr
; res = OpenCluster(lpszClusterName)
; lpszClusterName : LPCWSTR optional -> "wstr"

; HCLUSTER OpenCluster(LPCWSTR lpszClusterName)
#uselib "CLUSAPI.dll"
#cfunc global OpenCluster "OpenCluster" wstr
; res = OpenCluster(lpszClusterName)
; lpszClusterName : LPCWSTR optional -> "wstr"

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

var (
	clusapi = windows.NewLazySystemDLL("CLUSAPI.dll")
	procOpenCluster = clusapi.NewProc("OpenCluster")
)

// lpszClusterName (LPCWSTR optional)
r1, _, err := procOpenCluster.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszClusterName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HCLUSTER

function OpenCluster(
  lpszClusterName: PWideChar   // LPCWSTR optional
): NativeInt; stdcall;
  external 'CLUSAPI.dll' name 'OpenCluster';

result := DllCall("CLUSAPI\OpenCluster"
    , "WStr", lpszClusterName   ; LPCWSTR optional
    , "Ptr")   ; return: HCLUSTER

●OpenCluster(lpszClusterName) = DLL("CLUSAPI.dll", "int OpenCluster(char*)")
# 呼び出し: OpenCluster(lpszClusterName)
# lpszClusterName : LPCWSTR optional -> "char*"
# 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)。