PropVariantToBuffer

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

HRESULT PropVariantToBuffer(
    const PROPVARIANT* propvar,
    void* pv,
    DWORD cb
);

<DllImport("PROPSYS.dll", ExactSpelling:=True)>
Public Shared Function PropVariantToBuffer(
    propvar As IntPtr,   ' PROPVARIANT*
    pv As IntPtr,   ' void* out
    cb As UInteger   ' DWORD
) As Integer
End Function

' propvar : PROPVARIANT*
' pv : void* out
' cb : DWORD
Declare PtrSafe Function PropVariantToBuffer Lib "propsys" ( _
    ByVal propvar As LongPtr, _
    ByVal pv As LongPtr, _
    ByVal cb As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PropVariantToBuffer = ctypes.windll.propsys.PropVariantToBuffer
PropVariantToBuffer.restype = ctypes.c_int
PropVariantToBuffer.argtypes = [
    ctypes.c_void_p,  # propvar : PROPVARIANT*
    ctypes.POINTER(None),  # pv : void* out
    wintypes.DWORD,  # cb : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PROPSYS.dll')
PropVariantToBuffer = Fiddle::Function.new(
  lib['PropVariantToBuffer'],
  [
    Fiddle::TYPE_VOIDP,  # propvar : PROPVARIANT*
    Fiddle::TYPE_VOIDP,  # pv : void* out
    -Fiddle::TYPE_INT,  # cb : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "propsys")]
extern "system" {
    fn PropVariantToBuffer(
        propvar: *const PROPVARIANT,  // PROPVARIANT*
        pv: *mut (),  // void* out
        cb: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("PROPSYS.dll")]
public static extern int PropVariantToBuffer(IntPtr propvar, IntPtr pv, uint cb);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PROPSYS_PropVariantToBuffer' -Namespace Win32 -PassThru
# $api::PropVariantToBuffer(propvar, pv, cb)

#uselib "PROPSYS.dll"
#func global PropVariantToBuffer "PropVariantToBuffer" sptr, sptr, sptr
; PropVariantToBuffer varptr(propvar), pv, cb   ; 戻り値は stat
; propvar : PROPVARIANT* -> "sptr"
; pv : void* out -> "sptr"
; cb : 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 "PROPSYS.dll"
#cfunc global PropVariantToBuffer "PropVariantToBuffer" var, sptr, int
; res = PropVariantToBuffer(propvar, pv, cb)
; propvar : PROPVARIANT* -> "var"
; pv : void* out -> "sptr"
; cb : 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。

; HRESULT PropVariantToBuffer(PROPVARIANT* propvar, void* pv, DWORD cb)
#uselib "PROPSYS.dll"
#cfunc global PropVariantToBuffer "PropVariantToBuffer" var, intptr, int
; res = PropVariantToBuffer(propvar, pv, cb)
; propvar : PROPVARIANT* -> "var"
; pv : void* out -> "intptr"
; cb : 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 (
	propsys = windows.NewLazySystemDLL("PROPSYS.dll")
	procPropVariantToBuffer = propsys.NewProc("PropVariantToBuffer")
)

// propvar (PROPVARIANT*), pv (void* out), cb (DWORD)
r1, _, err := procPropVariantToBuffer.Call(
	uintptr(propvar),
	uintptr(pv),
	uintptr(cb),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function PropVariantToBuffer(
  propvar: Pointer;   // PROPVARIANT*
  pv: Pointer;   // void* out
  cb: DWORD   // DWORD
): Integer; stdcall;
  external 'PROPSYS.dll' name 'PropVariantToBuffer';

result := DllCall("PROPSYS\PropVariantToBuffer"
    , "Ptr", propvar   ; PROPVARIANT*
    , "Ptr", pv   ; void* out
    , "UInt", cb   ; DWORD
    , "Int")   ; return: HRESULT

●PropVariantToBuffer(propvar, pv, cb) = DLL("PROPSYS.dll", "int PropVariantToBuffer(void*, void*, dword)")
# 呼び出し: PropVariantToBuffer(propvar, pv, cb)
# propvar : PROPVARIANT* -> "void*"
# pv : void* out -> "void*"
# cb : 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)。