SafeArrayGetElement

// OLEAUT32.dll
#include <windows.h>

HRESULT SafeArrayGetElement(
    SAFEARRAY* psa,
    INT* rgIndices,
    void* pv
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function SafeArrayGetElement(
    psa As IntPtr,   ' SAFEARRAY*
    ByRef rgIndices As Integer,   ' INT*
    pv As IntPtr   ' void* out
) As Integer
End Function

' psa : SAFEARRAY*
' rgIndices : INT*
' pv : void* out
Declare PtrSafe Function SafeArrayGetElement Lib "oleaut32" ( _
    ByVal psa As LongPtr, _
    ByRef rgIndices As Long, _
    ByVal pv 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

SafeArrayGetElement = ctypes.windll.oleaut32.SafeArrayGetElement
SafeArrayGetElement.restype = ctypes.c_int
SafeArrayGetElement.argtypes = [
    ctypes.c_void_p,  # psa : SAFEARRAY*
    ctypes.POINTER(ctypes.c_int),  # rgIndices : INT*
    ctypes.POINTER(None),  # pv : void* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
SafeArrayGetElement = Fiddle::Function.new(
  lib['SafeArrayGetElement'],
  [
    Fiddle::TYPE_VOIDP,  # psa : SAFEARRAY*
    Fiddle::TYPE_VOIDP,  # rgIndices : INT*
    Fiddle::TYPE_VOIDP,  # pv : void* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn SafeArrayGetElement(
        psa: *mut SAFEARRAY,  // SAFEARRAY*
        rgIndices: *mut i32,  // INT*
        pv: *mut ()  // void* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int SafeArrayGetElement(IntPtr psa, ref int rgIndices, IntPtr pv);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_SafeArrayGetElement' -Namespace Win32 -PassThru
# $api::SafeArrayGetElement(psa, rgIndices, pv)

#uselib "OLEAUT32.dll"
#func global SafeArrayGetElement "SafeArrayGetElement" sptr, sptr, sptr
; SafeArrayGetElement varptr(psa), varptr(rgIndices), pv   ; 戻り値は stat
; psa : SAFEARRAY* -> "sptr"
; rgIndices : INT* -> "sptr"
; pv : void* 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 "OLEAUT32.dll"
#cfunc global SafeArrayGetElement "SafeArrayGetElement" var, var, sptr
; res = SafeArrayGetElement(psa, rgIndices, pv)
; psa : SAFEARRAY* -> "var"
; rgIndices : INT* -> "var"
; pv : void* out -> "sptr"
; ※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 SafeArrayGetElement(SAFEARRAY* psa, INT* rgIndices, void* pv)
#uselib "OLEAUT32.dll"
#cfunc global SafeArrayGetElement "SafeArrayGetElement" var, var, intptr
; res = SafeArrayGetElement(psa, rgIndices, pv)
; psa : SAFEARRAY* -> "var"
; rgIndices : INT* -> "var"
; pv : void* out -> "intptr"
; ※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 (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procSafeArrayGetElement = oleaut32.NewProc("SafeArrayGetElement")
)

// psa (SAFEARRAY*), rgIndices (INT*), pv (void* out)
r1, _, err := procSafeArrayGetElement.Call(
	uintptr(psa),
	uintptr(rgIndices),
	uintptr(pv),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function SafeArrayGetElement(
  psa: Pointer;   // SAFEARRAY*
  rgIndices: Pointer;   // INT*
  pv: Pointer   // void* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'SafeArrayGetElement';

result := DllCall("OLEAUT32\SafeArrayGetElement"
    , "Ptr", psa   ; SAFEARRAY*
    , "Ptr", rgIndices   ; INT*
    , "Ptr", pv   ; void* out
    , "Int")   ; return: HRESULT

●SafeArrayGetElement(psa, rgIndices, pv) = DLL("OLEAUT32.dll", "int SafeArrayGetElement(void*, void*, void*)")
# 呼び出し: SafeArrayGetElement(psa, rgIndices, pv)
# psa : SAFEARRAY* -> "void*"
# rgIndices : INT* -> "void*"
# pv : void* 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)。