AUDIO_ENVIRONMENT_STATE_CHANGE_NOTIFICATION

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct PROPERTYKEY
{
    public Guid fmtid;
    public uint pid;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct AUDIO_ENVIRONMENT_STATE_CHANGE_NOTIFICATION
{
    public IntPtr propertyStore;
    public PROPERTYKEY propertyKey;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure PROPERTYKEY
    Public fmtid As Guid
    Public pid As UInteger
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure AUDIO_ENVIRONMENT_STATE_CHANGE_NOTIFICATION
    Public propertyStore As IntPtr
    Public propertyKey As PROPERTYKEY
End Structure

import ctypes
from ctypes import wintypes

class PROPERTYKEY(ctypes.Structure):
    _fields_ = [
        ("fmtid", GUID),
        ("pid", wintypes.DWORD),
    ]

class AUDIO_ENVIRONMENT_STATE_CHANGE_NOTIFICATION(ctypes.Structure):
    _fields_ = [
        ("propertyStore", ctypes.c_void_p),
        ("propertyKey", PROPERTYKEY),
    ]

#[repr(C)]
pub struct PROPERTYKEY {
    pub fmtid: GUID,
    pub pid: u32,
}

#[repr(C)]
pub struct AUDIO_ENVIRONMENT_STATE_CHANGE_NOTIFICATION {
    pub propertyStore: *mut core::ffi::c_void,
    pub propertyKey: PROPERTYKEY,
}

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

type PROPERTYKEY struct {
	fmtid windows.GUID
	pid uint32
}

type AUDIO_ENVIRONMENT_STATE_CHANGE_NOTIFICATION struct {
	propertyStore uintptr
	propertyKey PROPERTYKEY
}

type
  PROPERTYKEY = record
    fmtid: TGUID;
    pid: DWORD;
  end;

  AUDIO_ENVIRONMENT_STATE_CHANGE_NOTIFICATION = record
    propertyStore: Pointer;
    propertyKey: PROPERTYKEY;
  end;

const PROPERTYKEY = extern struct {
    fmtid: GUID,
    pid: u32,
};

const AUDIO_ENVIRONMENT_STATE_CHANGE_NOTIFICATION = extern struct {
    propertyStore: ?*anyopaque,
    propertyKey: PROPERTYKEY,
};

type
  PROPERTYKEY {.bycopy.} = object
    fmtid: GUID
    pid: uint32

  AUDIO_ENVIRONMENT_STATE_CHANGE_NOTIFICATION {.bycopy.} = object
    propertyStore: pointer
    propertyKey: PROPERTYKEY

struct PROPERTYKEY
{
    GUID fmtid;
    uint pid;
}

struct AUDIO_ENVIRONMENT_STATE_CHANGE_NOTIFICATION
{
    void* propertyStore;
    PROPERTYKEY propertyKey;
}