InitVariantFromVariantArrayElem

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

HRESULT InitVariantFromVariantArrayElem(
    const VARIANT* varIn,
    DWORD iElem,
    VARIANT* pvar
);

<DllImport("PROPSYS.dll", ExactSpelling:=True)>
Public Shared Function InitVariantFromVariantArrayElem(
    varIn As IntPtr,   ' VARIANT*
    iElem As UInteger,   ' DWORD
    pvar As IntPtr   ' VARIANT* out
) As Integer
End Function

' varIn : VARIANT*
' iElem : DWORD
' pvar : VARIANT* out
Declare PtrSafe Function InitVariantFromVariantArrayElem Lib "propsys" ( _
    ByVal varIn As LongPtr, _
    ByVal iElem As Long, _
    ByVal pvar 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

InitVariantFromVariantArrayElem = ctypes.windll.propsys.InitVariantFromVariantArrayElem
InitVariantFromVariantArrayElem.restype = ctypes.c_int
InitVariantFromVariantArrayElem.argtypes = [
    ctypes.c_void_p,  # varIn : VARIANT*
    wintypes.DWORD,  # iElem : DWORD
    ctypes.c_void_p,  # pvar : VARIANT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PROPSYS.dll')
InitVariantFromVariantArrayElem = Fiddle::Function.new(
  lib['InitVariantFromVariantArrayElem'],
  [
    Fiddle::TYPE_VOIDP,  # varIn : VARIANT*
    -Fiddle::TYPE_INT,  # iElem : DWORD
    Fiddle::TYPE_VOIDP,  # pvar : VARIANT* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "propsys")]
extern "system" {
    fn InitVariantFromVariantArrayElem(
        varIn: *const VARIANT,  // VARIANT*
        iElem: u32,  // DWORD
        pvar: *mut VARIANT  // VARIANT* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("PROPSYS.dll")]
public static extern int InitVariantFromVariantArrayElem(IntPtr varIn, uint iElem, IntPtr pvar);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PROPSYS_InitVariantFromVariantArrayElem' -Namespace Win32 -PassThru
# $api::InitVariantFromVariantArrayElem(varIn, iElem, pvar)

#uselib "PROPSYS.dll"
#func global InitVariantFromVariantArrayElem "InitVariantFromVariantArrayElem" sptr, sptr, sptr
; InitVariantFromVariantArrayElem varptr(varIn), iElem, varptr(pvar)   ; 戻り値は stat
; varIn : VARIANT* -> "sptr"
; iElem : DWORD -> "sptr"
; pvar : VARIANT* 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 "PROPSYS.dll"
#cfunc global InitVariantFromVariantArrayElem "InitVariantFromVariantArrayElem" var, int, var
; res = InitVariantFromVariantArrayElem(varIn, iElem, pvar)
; varIn : VARIANT* -> "var"
; iElem : DWORD -> "int"
; pvar : VARIANT* 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 InitVariantFromVariantArrayElem(VARIANT* varIn, DWORD iElem, VARIANT* pvar)
#uselib "PROPSYS.dll"
#cfunc global InitVariantFromVariantArrayElem "InitVariantFromVariantArrayElem" var, int, var
; res = InitVariantFromVariantArrayElem(varIn, iElem, pvar)
; varIn : VARIANT* -> "var"
; iElem : DWORD -> "int"
; pvar : VARIANT* 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 (
	propsys = windows.NewLazySystemDLL("PROPSYS.dll")
	procInitVariantFromVariantArrayElem = propsys.NewProc("InitVariantFromVariantArrayElem")
)

// varIn (VARIANT*), iElem (DWORD), pvar (VARIANT* out)
r1, _, err := procInitVariantFromVariantArrayElem.Call(
	uintptr(varIn),
	uintptr(iElem),
	uintptr(pvar),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function InitVariantFromVariantArrayElem(
  varIn: Pointer;   // VARIANT*
  iElem: DWORD;   // DWORD
  pvar: Pointer   // VARIANT* out
): Integer; stdcall;
  external 'PROPSYS.dll' name 'InitVariantFromVariantArrayElem';

result := DllCall("PROPSYS\InitVariantFromVariantArrayElem"
    , "Ptr", varIn   ; VARIANT*
    , "UInt", iElem   ; DWORD
    , "Ptr", pvar   ; VARIANT* out
    , "Int")   ; return: HRESULT

●InitVariantFromVariantArrayElem(varIn, iElem, pvar) = DLL("PROPSYS.dll", "int InitVariantFromVariantArrayElem(void*, dword, void*)")
# 呼び出し: InitVariantFromVariantArrayElem(varIn, iElem, pvar)
# varIn : VARIANT* -> "void*"
# iElem : DWORD -> "dword"
# pvar : VARIANT* 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)。