> For the complete documentation index, see [llms.txt](https://documentation.virbox.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.virbox.com/fundamentals.md).

# Fundamentals

- [Overview](https://documentation.virbox.com/fundamentals/overview.md)
- [GUI tool](https://documentation.virbox.com/fundamentals/gui-tool.md)
- [Protection Process](https://documentation.virbox.com/fundamentals/protection-process.md)
- [CLI Tool: Overview](https://documentation.virbox.com/fundamentals/cli-tool-overview.md): Virbox Protector provides command line interface tool to developer also, Developer may use the CLI tool to protect application in "Build in" process. Virbox Protector CLI tool includes 2 tools:
- [CLI Tool: User Manual](https://documentation.virbox.com/fundamentals/cli-tool-user-manual.md)
- [User Manual\_Virbox Protector Command Line](https://documentation.virbox.com/fundamentals/cli-tool-user-manual/user-manual_virbox-protector-command-line.md)
- [Set the SDK label (Annotation) to protect the specified Functions/Code/String](https://documentation.virbox.com/fundamentals/cli-tool-user-manual/set-the-sdk-label-annotation-to-protect-the-specified-functions-code-string.md): In project coding, SDK label API used to mark the specified functions/code/string before compile, when Developer use Virbox Protector to protect app. Virbox will recognize & protect the label function
- [Other Useful tool](https://documentation.virbox.com/fundamentals/other-useful-tool.md)
- [User Guide: Windows Virtual Folder](https://documentation.virbox.com/fundamentals/other-useful-tool/user-guide-windows-virtual-folder.md)