StgSerializePropVariant

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

HRESULT StgSerializePropVariant(
    const PROPVARIANT* ppropvar,
    SERIALIZEDPROPERTYVALUE** ppProp,
    DWORD* pcb
);

<DllImport("PROPSYS.dll", ExactSpelling:=True)>
Public Shared Function StgSerializePropVariant(
    ppropvar As IntPtr,   ' PROPVARIANT*
    ppProp As IntPtr,   ' SERIALIZEDPROPERTYVALUE** out
    <Out> ByRef pcb As UInteger   ' DWORD* out
) As Integer
End Function

' ppropvar : PROPVARIANT*
' ppProp : SERIALIZEDPROPERTYVALUE** out
' pcb : DWORD* out
Declare PtrSafe Function StgSerializePropVariant Lib "propsys" ( _
    ByVal ppropvar As LongPtr, _
    ByVal ppProp As LongPtr, _
    ByRef pcb 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

StgSerializePropVariant = ctypes.windll.propsys.StgSerializePropVariant
StgSerializePropVariant.restype = ctypes.c_int
StgSerializePropVariant.argtypes = [
    ctypes.c_void_p,  # ppropvar : PROPVARIANT*
    ctypes.c_void_p,  # ppProp : SERIALIZEDPROPERTYVALUE** out
    ctypes.POINTER(wintypes.DWORD),  # pcb : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PROPSYS.dll')
StgSerializePropVariant = Fiddle::Function.new(
  lib['StgSerializePropVariant'],
  [
    Fiddle::TYPE_VOIDP,  # ppropvar : PROPVARIANT*
    Fiddle::TYPE_VOIDP,  # ppProp : SERIALIZEDPROPERTYVALUE** out
    Fiddle::TYPE_VOIDP,  # pcb : DWORD* out
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("PROPSYS.dll")]
public static extern int StgSerializePropVariant(IntPtr ppropvar, IntPtr ppProp, out uint pcb);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PROPSYS_StgSerializePropVariant' -Namespace Win32 -PassThru
# $api::StgSerializePropVariant(ppropvar, ppProp, pcb)

#uselib "PROPSYS.dll"
#func global StgSerializePropVariant "StgSerializePropVariant" sptr, sptr, sptr
; StgSerializePropVariant varptr(ppropvar), varptr(ppProp), varptr(pcb)   ; 戻り値は stat
; ppropvar : PROPVARIANT* -> "sptr"
; ppProp : SERIALIZEDPROPERTYVALUE** out -> "sptr"
; pcb : DWORD* 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 StgSerializePropVariant "StgSerializePropVariant" var, var, var
; res = StgSerializePropVariant(ppropvar, ppProp, pcb)
; ppropvar : PROPVARIANT* -> "var"
; ppProp : SERIALIZEDPROPERTYVALUE** out -> "var"
; pcb : DWORD* 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 StgSerializePropVariant(PROPVARIANT* ppropvar, SERIALIZEDPROPERTYVALUE** ppProp, DWORD* pcb)
#uselib "PROPSYS.dll"
#cfunc global StgSerializePropVariant "StgSerializePropVariant" var, var, var
; res = StgSerializePropVariant(ppropvar, ppProp, pcb)
; ppropvar : PROPVARIANT* -> "var"
; ppProp : SERIALIZEDPROPERTYVALUE** out -> "var"
; pcb : DWORD* 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")
	procStgSerializePropVariant = propsys.NewProc("StgSerializePropVariant")
)

// ppropvar (PROPVARIANT*), ppProp (SERIALIZEDPROPERTYVALUE** out), pcb (DWORD* out)
r1, _, err := procStgSerializePropVariant.Call(
	uintptr(ppropvar),
	uintptr(ppProp),
	uintptr(pcb),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function StgSerializePropVariant(
  ppropvar: Pointer;   // PROPVARIANT*
  ppProp: Pointer;   // SERIALIZEDPROPERTYVALUE** out
  pcb: Pointer   // DWORD* out
): Integer; stdcall;
  external 'PROPSYS.dll' name 'StgSerializePropVariant';

result := DllCall("PROPSYS\StgSerializePropVariant"
    , "Ptr", ppropvar   ; PROPVARIANT*
    , "Ptr", ppProp   ; SERIALIZEDPROPERTYVALUE** out
    , "Ptr", pcb   ; DWORD* out
    , "Int")   ; return: HRESULT

●StgSerializePropVariant(ppropvar, ppProp, pcb) = DLL("PROPSYS.dll", "int StgSerializePropVariant(void*, void*, void*)")
# 呼び出し: StgSerializePropVariant(ppropvar, ppProp, pcb)
# ppropvar : PROPVARIANT* -> "void*"
# ppProp : SERIALIZEDPROPERTYVALUE** out -> "void*"
# pcb : DWORD* 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)。