WindowsPreallocateStringBuffer

// api-ms-win-core-winrt-string-l1-1-0.dll
#include <windows.h>

HRESULT WindowsPreallocateStringBuffer(
    DWORD length,
    WORD** charBuffer,
    HSTRING_BUFFER* bufferHandle
);

<DllImport("api-ms-win-core-winrt-string-l1-1-0.dll", ExactSpelling:=True)>
Public Shared Function WindowsPreallocateStringBuffer(
    length As UInteger,   ' DWORD
    charBuffer As IntPtr,   ' WORD** out
    bufferHandle As IntPtr   ' HSTRING_BUFFER* out
) As Integer
End Function

' length : DWORD
' charBuffer : WORD** out
' bufferHandle : HSTRING_BUFFER* out
Declare PtrSafe Function WindowsPreallocateStringBuffer Lib "api-ms-win-core-winrt-string-l1-1-0" ( _
    ByVal length As Long, _
    ByVal charBuffer As LongPtr, _
    ByVal bufferHandle 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

WindowsPreallocateStringBuffer = ctypes.windll.LoadLibrary("api-ms-win-core-winrt-string-l1-1-0.dll").WindowsPreallocateStringBuffer
WindowsPreallocateStringBuffer.restype = ctypes.c_int
WindowsPreallocateStringBuffer.argtypes = [
    wintypes.DWORD,  # length : DWORD
    ctypes.c_void_p,  # charBuffer : WORD** out
    ctypes.c_void_p,  # bufferHandle : HSTRING_BUFFER* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('api-ms-win-core-winrt-string-l1-1-0.dll')
WindowsPreallocateStringBuffer = Fiddle::Function.new(
  lib['WindowsPreallocateStringBuffer'],
  [
    -Fiddle::TYPE_INT,  # length : DWORD
    Fiddle::TYPE_VOIDP,  # charBuffer : WORD** out
    Fiddle::TYPE_VOIDP,  # bufferHandle : HSTRING_BUFFER* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "api-ms-win-core-winrt-string-l1-1-0")]
extern "system" {
    fn WindowsPreallocateStringBuffer(
        length: u32,  // DWORD
        charBuffer: *mut *mut u16,  // WORD** out
        bufferHandle: *mut *mut core::ffi::c_void  // HSTRING_BUFFER* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("api-ms-win-core-winrt-string-l1-1-0.dll")]
public static extern int WindowsPreallocateStringBuffer(uint length, IntPtr charBuffer, IntPtr bufferHandle);
"@
$api = Add-Type -MemberDefinition $sig -Name 'api-ms-win-core-winrt-string-l1-1-0_WindowsPreallocateStringBuffer' -Namespace Win32 -PassThru
# $api::WindowsPreallocateStringBuffer(length, charBuffer, bufferHandle)

#uselib "api-ms-win-core-winrt-string-l1-1-0.dll"
#func global WindowsPreallocateStringBuffer "WindowsPreallocateStringBuffer" sptr, sptr, sptr
; WindowsPreallocateStringBuffer length, varptr(charBuffer), bufferHandle   ; 戻り値は stat
; length : DWORD -> "sptr"
; charBuffer : WORD** out -> "sptr"
; bufferHandle : HSTRING_BUFFER* 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 "api-ms-win-core-winrt-string-l1-1-0.dll"
#cfunc global WindowsPreallocateStringBuffer "WindowsPreallocateStringBuffer" int, var, sptr
; res = WindowsPreallocateStringBuffer(length, charBuffer, bufferHandle)
; length : DWORD -> "int"
; charBuffer : WORD** out -> "var"
; bufferHandle : HSTRING_BUFFER* 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 WindowsPreallocateStringBuffer(DWORD length, WORD** charBuffer, HSTRING_BUFFER* bufferHandle)
#uselib "api-ms-win-core-winrt-string-l1-1-0.dll"
#cfunc global WindowsPreallocateStringBuffer "WindowsPreallocateStringBuffer" int, var, intptr
; res = WindowsPreallocateStringBuffer(length, charBuffer, bufferHandle)
; length : DWORD -> "int"
; charBuffer : WORD** out -> "var"
; bufferHandle : HSTRING_BUFFER* 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 (
	api_ms_win_core_winrt_string_l1_1_0 = windows.NewLazySystemDLL("api-ms-win-core-winrt-string-l1-1-0.dll")
	procWindowsPreallocateStringBuffer = api_ms_win_core_winrt_string_l1_1_0.NewProc("WindowsPreallocateStringBuffer")
)

// length (DWORD), charBuffer (WORD** out), bufferHandle (HSTRING_BUFFER* out)
r1, _, err := procWindowsPreallocateStringBuffer.Call(
	uintptr(length),
	uintptr(charBuffer),
	uintptr(bufferHandle),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WindowsPreallocateStringBuffer(
  length: DWORD;   // DWORD
  charBuffer: Pointer;   // WORD** out
  bufferHandle: Pointer   // HSTRING_BUFFER* out
): Integer; stdcall;
  external 'api-ms-win-core-winrt-string-l1-1-0.dll' name 'WindowsPreallocateStringBuffer';

result := DllCall("api-ms-win-core-winrt-string-l1-1-0\WindowsPreallocateStringBuffer"
    , "UInt", length   ; DWORD
    , "Ptr", charBuffer   ; WORD** out
    , "Ptr", bufferHandle   ; HSTRING_BUFFER* out
    , "Int")   ; return: HRESULT

●WindowsPreallocateStringBuffer(length, charBuffer, bufferHandle) = DLL("api-ms-win-core-winrt-string-l1-1-0.dll", "int WindowsPreallocateStringBuffer(dword, void*, void*)")
# 呼び出し: WindowsPreallocateStringBuffer(length, charBuffer, bufferHandle)
# length : DWORD -> "dword"
# charBuffer : WORD** out -> "void*"
# bufferHandle : HSTRING_BUFFER* 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)。