userSTGMEDIUM

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct userSTGMEDIUM
{
    public _STGMEDIUM_UNION u;
    public IntPtr pUnkForRelease;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure userSTGMEDIUM
    Public u As _STGMEDIUM_UNION
    Public pUnkForRelease As IntPtr
End Structure

import ctypes
from ctypes import wintypes

class userSTGMEDIUM(ctypes.Structure):
    _fields_ = [
        ("u", _STGMEDIUM_UNION),
        ("pUnkForRelease", ctypes.c_void_p),
    ]

#[repr(C)]
pub struct userSTGMEDIUM {
    pub u: _STGMEDIUM_UNION,
    pub pUnkForRelease: *mut core::ffi::c_void,
}

import "golang.org/x/sys/windows"

type userSTGMEDIUM struct {
	u _STGMEDIUM_UNION
	pUnkForRelease uintptr
}

type
  userSTGMEDIUM = record
    u: _STGMEDIUM_UNION;
    pUnkForRelease: Pointer;
  end;

const userSTGMEDIUM = extern struct {
    u: _STGMEDIUM_UNION,
    pUnkForRelease: ?*anyopaque,
};

type
  userSTGMEDIUM {.bycopy.} = object
    u: _STGMEDIUM_UNION
    pUnkForRelease: pointer

struct userSTGMEDIUM
{
    _STGMEDIUM_UNION u;
    void* pUnkForRelease;
}