GetHGlobalFromILockBytes

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

HRESULT GetHGlobalFromILockBytes(
    ILockBytes* plkbyt,
    HGLOBAL* phglobal
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function GetHGlobalFromILockBytes(
    plkbyt As IntPtr,   ' ILockBytes*
    phglobal As IntPtr   ' HGLOBAL* out
) As Integer
End Function

' plkbyt : ILockBytes*
' phglobal : HGLOBAL* out
Declare PtrSafe Function GetHGlobalFromILockBytes Lib "ole32" ( _
    ByVal plkbyt As LongPtr, _
    ByVal phglobal 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

GetHGlobalFromILockBytes = ctypes.windll.ole32.GetHGlobalFromILockBytes
GetHGlobalFromILockBytes.restype = ctypes.c_int
GetHGlobalFromILockBytes.argtypes = [
    ctypes.c_void_p,  # plkbyt : ILockBytes*
    ctypes.c_void_p,  # phglobal : HGLOBAL* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
GetHGlobalFromILockBytes = Fiddle::Function.new(
  lib['GetHGlobalFromILockBytes'],
  [
    Fiddle::TYPE_VOIDP,  # plkbyt : ILockBytes*
    Fiddle::TYPE_VOIDP,  # phglobal : HGLOBAL* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn GetHGlobalFromILockBytes(
        plkbyt: *mut core::ffi::c_void,  // ILockBytes*
        phglobal: *mut *mut core::ffi::c_void  // HGLOBAL* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern int GetHGlobalFromILockBytes(IntPtr plkbyt, IntPtr phglobal);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_GetHGlobalFromILockBytes' -Namespace Win32 -PassThru
# $api::GetHGlobalFromILockBytes(plkbyt, phglobal)

#uselib "OLE32.dll"
#func global GetHGlobalFromILockBytes "GetHGlobalFromILockBytes" sptr, sptr
; GetHGlobalFromILockBytes plkbyt, phglobal   ; 戻り値は stat
; plkbyt : ILockBytes* -> "sptr"
; phglobal : HGLOBAL* 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 GetHGlobalFromILockBytes "GetHGlobalFromILockBytes" sptr, sptr
; res = GetHGlobalFromILockBytes(plkbyt, phglobal)
; plkbyt : ILockBytes* -> "sptr"
; phglobal : HGLOBAL* out -> "sptr"

; HRESULT GetHGlobalFromILockBytes(ILockBytes* plkbyt, HGLOBAL* phglobal)
#uselib "OLE32.dll"
#cfunc global GetHGlobalFromILockBytes "GetHGlobalFromILockBytes" intptr, intptr
; res = GetHGlobalFromILockBytes(plkbyt, phglobal)
; plkbyt : ILockBytes* -> "intptr"
; phglobal : HGLOBAL* out -> "intptr"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procGetHGlobalFromILockBytes = ole32.NewProc("GetHGlobalFromILockBytes")
)

// plkbyt (ILockBytes*), phglobal (HGLOBAL* out)
r1, _, err := procGetHGlobalFromILockBytes.Call(
	uintptr(plkbyt),
	uintptr(phglobal),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function GetHGlobalFromILockBytes(
  plkbyt: Pointer;   // ILockBytes*
  phglobal: Pointer   // HGLOBAL* out
): Integer; stdcall;
  external 'OLE32.dll' name 'GetHGlobalFromILockBytes';

result := DllCall("OLE32\GetHGlobalFromILockBytes"
    , "Ptr", plkbyt   ; ILockBytes*
    , "Ptr", phglobal   ; HGLOBAL* out
    , "Int")   ; return: HRESULT

●GetHGlobalFromILockBytes(plkbyt, phglobal) = DLL("OLE32.dll", "int GetHGlobalFromILockBytes(void*, void*)")
# 呼び出し: GetHGlobalFromILockBytes(plkbyt, phglobal)
# plkbyt : ILockBytes* -> "void*"
# phglobal : HGLOBAL* 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)。