NCCALCSIZE_PARAMS

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct RECT
{
    public int left;
    public int top;
    public int right;
    public int bottom;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct NCCALCSIZE_PARAMS
{
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)] public RECT[] rgrc;
    public IntPtr lppos;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure RECT
    Public left As Integer
    Public top As Integer
    Public right As Integer
    Public bottom As Integer
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure NCCALCSIZE_PARAMS
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=3)> Public rgrc() As RECT
    Public lppos As IntPtr
End Structure

import ctypes
from ctypes import wintypes

class RECT(ctypes.Structure):
    _fields_ = [
        ("left", ctypes.c_int),
        ("top", ctypes.c_int),
        ("right", ctypes.c_int),
        ("bottom", ctypes.c_int),
    ]

class NCCALCSIZE_PARAMS(ctypes.Structure):
    _fields_ = [
        ("rgrc", RECT * 3),
        ("lppos", ctypes.c_void_p),
    ]

#[repr(C)]
pub struct RECT {
    pub left: i32,
    pub top: i32,
    pub right: i32,
    pub bottom: i32,
}

#[repr(C)]
pub struct NCCALCSIZE_PARAMS {
    pub rgrc: [RECT; 3],
    pub lppos: *mut core::ffi::c_void,
}

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

type RECT struct {
	left int32
	top int32
	right int32
	bottom int32
}

type NCCALCSIZE_PARAMS struct {
	rgrc [3]RECT
	lppos uintptr
}

type
  RECT = record
    left: Integer;
    top: Integer;
    right: Integer;
    bottom: Integer;
  end;

  NCCALCSIZE_PARAMS = record
    rgrc: array[0..2] of RECT;
    lppos: Pointer;
  end;

const RECT = extern struct {
    left: i32,
    top: i32,
    right: i32,
    bottom: i32,
};

const NCCALCSIZE_PARAMS = extern struct {
    rgrc: [3]RECT,
    lppos: ?*anyopaque,
};

type
  RECT {.bycopy.} = object
    left: int32
    top: int32
    right: int32
    bottom: int32

  NCCALCSIZE_PARAMS {.bycopy.} = object
    rgrc: array[3, RECT]
    lppos: pointer

struct RECT
{
    int left;
    int top;
    int right;
    int bottom;
}

struct NCCALCSIZE_PARAMS
{
    RECT[3] rgrc;
    void* lppos;
}