DIRTYRECT_INFO

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 DIRTYRECT_INFO
{
    public uint FrameNumber;
    public uint NumDirtyRects;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)] public RECT[] DirtyRects;
}

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 DIRTYRECT_INFO
    Public FrameNumber As UInteger
    Public NumDirtyRects As UInteger
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=1)> Public DirtyRects() As RECT
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 DIRTYRECT_INFO(ctypes.Structure):
    _fields_ = [
        ("FrameNumber", wintypes.DWORD),
        ("NumDirtyRects", wintypes.DWORD),
        ("DirtyRects", RECT * 1),
    ]

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

#[repr(C)]
pub struct DIRTYRECT_INFO {
    pub FrameNumber: u32,
    pub NumDirtyRects: u32,
    pub DirtyRects: [RECT; 1],
}

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

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

type DIRTYRECT_INFO struct {
	FrameNumber uint32
	NumDirtyRects uint32
	DirtyRects [1]RECT
}

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

  DIRTYRECT_INFO = record
    FrameNumber: DWORD;
    NumDirtyRects: DWORD;
    DirtyRects: array[0..0] of RECT;
  end;

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

const DIRTYRECT_INFO = extern struct {
    FrameNumber: u32,
    NumDirtyRects: u32,
    DirtyRects: [1]RECT,
};

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

  DIRTYRECT_INFO {.bycopy.} = object
    FrameNumber: uint32
    NumDirtyRects: uint32
    DirtyRects: array[1, RECT]

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

struct DIRTYRECT_INFO
{
    uint FrameNumber;
    uint NumDirtyRects;
    RECT[1] DirtyRects;
}