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twinBASIC

A modern classic BASIC programming language.

Crafted from the ground up for exceptional compatibility with classic VB6 projects, twinBASIC lets you open and run your existing code - then take it further with modern language features, native 64-bit compilation, and a powerful new IDE.

Build for both 32-bit and 64-bit Windows from a single codebase, with full Unicode support, advanced debugging, modern controls, and ongoing language innovation.

Keep your code. Expand your possibilities. Welcome to twinBASIC.

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Compatibility

Open existing VB6 projects. Familiar language, objects, and libraries. Continue working with the language, libraries, and workflows you already know - now with modern tooling.

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Native 32-bit & 64-bit

Build true native Win32 and Win64 applications from the same codebase, with future support planned for Windows-on-ARM and additional cross-platform targets.

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Modern IDE & Debugger

A modern development environment with live diagnostics, code folding, semantic highlighting, integrated debugging, plus many quality-of-life improvements.

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Additional Features

Full unicode support, modern language enhancements, new controls, package management, inheritance, generics, and many more capabilities beyond classic BASIC environments.

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Why twinBASIC?

Preserve your existing code, knowledge, and long-term investment
Build modern native applications for both 32-bit and 64-bit Windows
Powerful IDE, debugger, and modern language enhancements
Flexible licensing with a generous free Community Edition

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