StgOpenStorage

// OLE32.dll
#include <windows.h>

HRESULT StgOpenStorage(
    LPCWSTR pwcsName,   // optional
    IStorage* pstgPriority,   // optional
    STGM grfMode,
    WORD** snbExclude,   // optional
    DWORD reserved,
    IStorage** ppstgOpen
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function StgOpenStorage(
    <MarshalAs(UnmanagedType.LPWStr)> pwcsName As String,   ' LPCWSTR optional
    pstgPriority As IntPtr,   ' IStorage* optional
    grfMode As UInteger,   ' STGM
    snbExclude As IntPtr,   ' WORD** optional
    reserved As UInteger,   ' DWORD
    ppstgOpen As IntPtr   ' IStorage** out
) As Integer
End Function

' pwcsName : LPCWSTR optional
' pstgPriority : IStorage* optional
' grfMode : STGM
' snbExclude : WORD** optional
' reserved : DWORD
' ppstgOpen : IStorage** out
Declare PtrSafe Function StgOpenStorage Lib "ole32" ( _
    ByVal pwcsName As LongPtr, _
    ByVal pstgPriority As LongPtr, _
    ByVal grfMode As Long, _
    ByVal snbExclude As LongPtr, _
    ByVal reserved As Long, _
    ByVal ppstgOpen 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

StgOpenStorage = ctypes.windll.ole32.StgOpenStorage
StgOpenStorage.restype = ctypes.c_int
StgOpenStorage.argtypes = [
    wintypes.LPCWSTR,  # pwcsName : LPCWSTR optional
    ctypes.c_void_p,  # pstgPriority : IStorage* optional
    wintypes.DWORD,  # grfMode : STGM
    ctypes.c_void_p,  # snbExclude : WORD** optional
    wintypes.DWORD,  # reserved : DWORD
    ctypes.c_void_p,  # ppstgOpen : IStorage** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
StgOpenStorage = Fiddle::Function.new(
  lib['StgOpenStorage'],
  [
    Fiddle::TYPE_VOIDP,  # pwcsName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pstgPriority : IStorage* optional
    -Fiddle::TYPE_INT,  # grfMode : STGM
    Fiddle::TYPE_VOIDP,  # snbExclude : WORD** optional
    -Fiddle::TYPE_INT,  # reserved : DWORD
    Fiddle::TYPE_VOIDP,  # ppstgOpen : IStorage** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn StgOpenStorage(
        pwcsName: *const u16,  // LPCWSTR optional
        pstgPriority: *mut core::ffi::c_void,  // IStorage* optional
        grfMode: u32,  // STGM
        snbExclude: *mut *mut u16,  // WORD** optional
        reserved: u32,  // DWORD
        ppstgOpen: *mut *mut core::ffi::c_void  // IStorage** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern int StgOpenStorage([MarshalAs(UnmanagedType.LPWStr)] string pwcsName, IntPtr pstgPriority, uint grfMode, IntPtr snbExclude, uint reserved, IntPtr ppstgOpen);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_StgOpenStorage' -Namespace Win32 -PassThru
# $api::StgOpenStorage(pwcsName, pstgPriority, grfMode, snbExclude, reserved, ppstgOpen)

#uselib "OLE32.dll"
#func global StgOpenStorage "StgOpenStorage" sptr, sptr, sptr, sptr, sptr, sptr
; StgOpenStorage pwcsName, pstgPriority, grfMode, varptr(snbExclude), reserved, ppstgOpen   ; 戻り値は stat
; pwcsName : LPCWSTR optional -> "sptr"
; pstgPriority : IStorage* optional -> "sptr"
; grfMode : STGM -> "sptr"
; snbExclude : WORD** optional -> "sptr"
; reserved : DWORD -> "sptr"
; ppstgOpen : IStorage** 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 "OLE32.dll"
#cfunc global StgOpenStorage "StgOpenStorage" wstr, sptr, int, var, int, sptr
; res = StgOpenStorage(pwcsName, pstgPriority, grfMode, snbExclude, reserved, ppstgOpen)
; pwcsName : LPCWSTR optional -> "wstr"
; pstgPriority : IStorage* optional -> "sptr"
; grfMode : STGM -> "int"
; snbExclude : WORD** optional -> "var"
; reserved : DWORD -> "int"
; ppstgOpen : IStorage** 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 StgOpenStorage(LPCWSTR pwcsName, IStorage* pstgPriority, STGM grfMode, WORD** snbExclude, DWORD reserved, IStorage** ppstgOpen)
#uselib "OLE32.dll"
#cfunc global StgOpenStorage "StgOpenStorage" wstr, intptr, int, var, int, intptr
; res = StgOpenStorage(pwcsName, pstgPriority, grfMode, snbExclude, reserved, ppstgOpen)
; pwcsName : LPCWSTR optional -> "wstr"
; pstgPriority : IStorage* optional -> "intptr"
; grfMode : STGM -> "int"
; snbExclude : WORD** optional -> "var"
; reserved : DWORD -> "int"
; ppstgOpen : IStorage** 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 (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procStgOpenStorage = ole32.NewProc("StgOpenStorage")
)

// pwcsName (LPCWSTR optional), pstgPriority (IStorage* optional), grfMode (STGM), snbExclude (WORD** optional), reserved (DWORD), ppstgOpen (IStorage** out)
r1, _, err := procStgOpenStorage.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwcsName))),
	uintptr(pstgPriority),
	uintptr(grfMode),
	uintptr(snbExclude),
	uintptr(reserved),
	uintptr(ppstgOpen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function StgOpenStorage(
  pwcsName: PWideChar;   // LPCWSTR optional
  pstgPriority: Pointer;   // IStorage* optional
  grfMode: DWORD;   // STGM
  snbExclude: Pointer;   // WORD** optional
  reserved: DWORD;   // DWORD
  ppstgOpen: Pointer   // IStorage** out
): Integer; stdcall;
  external 'OLE32.dll' name 'StgOpenStorage';

result := DllCall("OLE32\StgOpenStorage"
    , "WStr", pwcsName   ; LPCWSTR optional
    , "Ptr", pstgPriority   ; IStorage* optional
    , "UInt", grfMode   ; STGM
    , "Ptr", snbExclude   ; WORD** optional
    , "UInt", reserved   ; DWORD
    , "Ptr", ppstgOpen   ; IStorage** out
    , "Int")   ; return: HRESULT

●StgOpenStorage(pwcsName, pstgPriority, grfMode, snbExclude, reserved, ppstgOpen) = DLL("OLE32.dll", "int StgOpenStorage(char*, void*, dword, void*, dword, void*)")
# 呼び出し: StgOpenStorage(pwcsName, pstgPriority, grfMode, snbExclude, reserved, ppstgOpen)
# pwcsName : LPCWSTR optional -> "char*"
# pstgPriority : IStorage* optional -> "void*"
# grfMode : STGM -> "dword"
# snbExclude : WORD** optional -> "void*"
# reserved : DWORD -> "dword"
# ppstgOpen : IStorage** 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)。