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version: 3.3.7

CmlLib.Core is a .NET library for building your own Custom Minecraft launcher.

Main Features

• Log in Minecraft to play online-mode multiplay servers (ex: Hypixel)

• Log in with Microsoft Xbox account

• Download and install vanilla Minecraft version

• Install appropriate Java runtime automatically

• Install mod loaders (Fabric, LiteLoader)

• Launch all game version (tested up to 1.19)

• Launch custom game version (ex: Forge, Fabric, LiteLoader, or any modified client)

• Launch with various options (direct server connecting, screen resolutions, etc)

• Crossplatform (Windows, Linux, macOS)

• Mojang APIs (player skin, changing player username, etc)

• Customize launch flow

All Features

Index

CMLauncher

• Basic usage

• Please read this first!

Sample Launcher

• CmlLibCoreSample: simple console program

• CmlLibWinFormSample: full features

Known Issues

• Java runtime errors

• macOS / Linux errors

Minecraft Path

• Get default minecraft directory

• Create new minecraft directory

• Make custom minecraft directory structure

Legacy Mojang Account

• Get game session from mojang auth server

• Create offline game session

Microsoft Xbox Account

• Login with Xbox account

Event Handling

• Show progress of downloading files (percentage, file count)

• Show file info of currently downloading file (file name)

Launch Options

• Maximum memory size (-Xmx), Minimum memory size (-Xms)

• Direct server connecting

• Screen resolution, Fullscreen

• Java setting

Downloader

• AsyncParallelDownloader (default)

• SequenceDownloader

FileChecker

• AssetChecker, ClientChecker, LibraryChecker

• Skip file hash checking

• Skip specific game file checking

• Use file mirror server (like BMCLAPI mirror service)

• Make custom file checker

VersionLoader

• Get version metadata list from local directory

• Get version metadata list from mojang server

• Get version metadata list from FabricMC server

• Get version metadata information (version name, type, release date, etc)

• Make custom version loader

Version

• Get version information (version name, type, arguments, library list, asset id, etc)

Mod Loader Installers

• Install Forge

• Install LiteLoader

• Install FabricMC

FAQ

• Launch custom version

• Get game output (logs)

• log4j2

Minecraft Changelogs

License