use winapi::um::winuser::{GetDC, ReleaseDC};
use winapi::shared::minwinbase::LPDWORD;
use std::fs::File;
use std::io::Write;
use winapi::shared::ntdef::HANDLE;
use winapi::um::gdiplus::Bitmap;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let hdc = unsafe { GetDC(std::ptr::null_mut()) };
    let mut bitmap = unsafe { Bitmap::FromHdc(hdc as _) };

    // Capture the entire screen
    let screenshot = bitmap.GetPixel(0, 0); // Simplified example

    // Save to file (requires GDI+ library)
    let mut file = File::create("screenshot.png")?;
    // Write raw pixel data (example structure)
    let mut encoder = bitmap.GetEncoderClsid()?;
    unsafe { bitmap.SaveFile("screenshot.png", &mut encoder, std::ptr::null_mut()) };

    unsafe { ReleaseDC(std::ptr::null_mut(), hdc) };
    Ok(())
}

*Requires*: `winapi` and GDI+ library.

---

use core_graphics::display::{CGSSessionGetScreenImage, CGImageRef};
use std::fs::File;
use std::io::Write;
use image::ImageEncoder;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let screen_image = unsafe { CGSSessionGetScreenImage() };
    let bitmap_image = CGImageRef::wrap(screen_image);

    // Convert to PNG
    let data = unsafe { bitmap_image.data() }?; // Hypothetical unsafe access
    let mut encoder = image::png::PNGEncoder::new(File::create("screenshot.png")?);
    encoder.encode(&data, bitmap_image.width(), bitmap_image.height(), &Default::default());

    Ok(())
}

*Requires*: `core-graphics` crate and macOS SDK.

---

use x11rb::connect::Connection;
use x11rb::protocol::xproto::GetImage;
use std::fs::File;
use std::io::Write;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let conn = Connection::new_default()?;
    let setup = conn.get_setup()?;
    let root = setup.roots[0].root;

    let (reply, _) = conn.get_image(
        GetImage {
            dst_depth: 24,
            dst_format: xproto::PixelFormat::ZPixmap,
            src_pixmap: root,
            x: 0,
            y: 0,
            width: 1920,
            height: 1080,
            ..Default::default()
        }
    )?;

    // Write raw pixel data to file
    let mut file = File::create("screenshot.xcf")?;
    file.write_all(&reply.data)?;

    Ok(())
}

*Requires*: `x11rb` crate and X1leshoot tools installed.

---

Use the `screenshot-capture` crate:

use screenshot_capture::{ScreenShot, ScreenShotOptions};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let options = ScreenShotOptions::new();
    let screenshot = ScreenShot::new(options)?;
    let data = screenshot.to_png()?; // Returns PNG bytes
    std::fs::write("screenshot.png", &data)?;
    Ok(())
}

*Add to `Cargo.toml`*: `screenshot-capture = "0.1"`

---