File Extension VBX File Format Visual basic extension (Microsoft Visual Basic) VBX stands for Visual basic extension (Microsoft Visual Basic). This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Migrating from ADO to ADO.NET Emerging trends and challenges in Visual Basic Connecting to Oracle with Visual Basic 2005?