SHCreateMemStream

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

IStream* SHCreateMemStream(
    const BYTE* pInit,   // optional
    DWORD cbInit
);

<DllImport("SHLWAPI.dll", ExactSpelling:=True)>
Public Shared Function SHCreateMemStream(
    pInit As IntPtr,   ' BYTE* optional
    cbInit As UInteger   ' DWORD
) As IntPtr
End Function

' pInit : BYTE* optional
' cbInit : DWORD
Declare PtrSafe Function SHCreateMemStream Lib "shlwapi" ( _
    ByVal pInit As LongPtr, _
    ByVal cbInit As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SHCreateMemStream = ctypes.windll.shlwapi.SHCreateMemStream
SHCreateMemStream.restype = ctypes.c_void_p
SHCreateMemStream.argtypes = [
    ctypes.POINTER(ctypes.c_ubyte),  # pInit : BYTE* optional
    wintypes.DWORD,  # cbInit : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
SHCreateMemStream = Fiddle::Function.new(
  lib['SHCreateMemStream'],
  [
    Fiddle::TYPE_VOIDP,  # pInit : BYTE* optional
    -Fiddle::TYPE_INT,  # cbInit : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "shlwapi")]
extern "system" {
    fn SHCreateMemStream(
        pInit: *const u8,  // BYTE* optional
        cbInit: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll")]
public static extern IntPtr SHCreateMemStream(IntPtr pInit, uint cbInit);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_SHCreateMemStream' -Namespace Win32 -PassThru
# $api::SHCreateMemStream(pInit, cbInit)

#uselib "SHLWAPI.dll"
#func global SHCreateMemStream "SHCreateMemStream" sptr, sptr
; SHCreateMemStream varptr(pInit), cbInit   ; 戻り値は stat
; pInit : BYTE* optional -> "sptr"
; cbInit : DWORD -> "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 "SHLWAPI.dll"
#cfunc global SHCreateMemStream "SHCreateMemStream" var, int
; res = SHCreateMemStream(pInit, cbInit)
; pInit : BYTE* optional -> "var"
; cbInit : DWORD -> "int"
; ※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。

; IStream* SHCreateMemStream(BYTE* pInit, DWORD cbInit)
#uselib "SHLWAPI.dll"
#cfunc global SHCreateMemStream "SHCreateMemStream" var, int
; res = SHCreateMemStream(pInit, cbInit)
; pInit : BYTE* optional -> "var"
; cbInit : DWORD -> "int"
; ※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 (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procSHCreateMemStream = shlwapi.NewProc("SHCreateMemStream")
)

// pInit (BYTE* optional), cbInit (DWORD)
r1, _, err := procSHCreateMemStream.Call(
	uintptr(pInit),
	uintptr(cbInit),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // IStream*

function SHCreateMemStream(
  pInit: Pointer;   // BYTE* optional
  cbInit: DWORD   // DWORD
): Pointer; stdcall;
  external 'SHLWAPI.dll' name 'SHCreateMemStream';

result := DllCall("SHLWAPI\SHCreateMemStream"
    , "Ptr", pInit   ; BYTE* optional
    , "UInt", cbInit   ; DWORD
    , "Ptr")   ; return: IStream*

●SHCreateMemStream(pInit, cbInit) = DLL("SHLWAPI.dll", "void* SHCreateMemStream(void*, dword)")
# 呼び出し: SHCreateMemStream(pInit, cbInit)
# pInit : BYTE* optional -> "void*"
# cbInit : DWORD -> "dword"
# 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)。