# Change BootLoader — C++ port

Native Win32 port of `Change_bootloader\Change_bootloader.au3` with the same
window, buttons, actions and messages.

## Build

Requirements: Visual Studio 2022 (Desktop C++) and CMake 3.20+.

```bat
build.cmd
```

Output:

```
build\Release\Change_BootLoader.exe
```

The executable is 32-bit, uses a static CRT (no VC++ redistributable), and
requests administrator rights through the embedded manifest.

## How it works

- The program must be started from the root of a PARAVIS flash drive, for
  example `F:\Change_BootLoader.exe`.
- It derives the drive from its own path and checks for
  `\efi\Paravis\Boot\bootice.exe` and `\efi\Paravis\Boot\NOT.DEL`.
- If those files are missing, it shows the original error and exits.
- Seven buttons perform the same operations as the AutoIt version:
  - Legacy BIOS: XorBoot, Bootmgr, Grub4Dos, Grub2
  - UEFI: Bootmgr, Grub2, Xorboot
- Bootice, xcopy and the GRUB2 MBR helper script are invoked exactly like
  the AutoIt version. The helper script is
  `\efi\Paravis\Boot\grub2\bios\make-paravis-mbr.ps1`.

## Notes

- The UI matches the AutoIt version (376 × 208, same fonts, positions,
  hover/pressed colors).
- Message boxes are native `MessageBoxW` dialogs with the same titles and
  texts.
- The debug log is disabled by default. Set `PARAVIS_DEBUG_LOG=1` to write
  `%TEMP%\cbl_cpp_debug.log`.
- The GRUB2 Legacy action uses the same bootice `/sectors` commands as the
  AutoIt version. On some virtual disks bootice displays its own sector
  confirmation/error dialogs; on a real PARAVIS USB flash it behaves the
  same as the original.

## Repository layout

```
src/            C++ sources and resources
legacy-au3/     original AutoIt script
build.cmd       release build
```

## License

MIT. See [`LICENSE`](LICENSE).

This repository contains source code only. Third-party binaries used at
runtime (`bootice.exe`, `xcopy`, `powershell.exe`) are not distributed here
and must be supplied by the system or by the PARAVIS flash image.