The VBP extension is given to files related to the integrated Microsoft Visual Basic development environment. A VBP is a plain text file used to store information about all files that make up a development project. These include Visual Basic BAS source code files, CLS class files, and FRM forms. The data in VBP files also allows you to determine where each project file is located.

VBP files were used in older versions of Microsoft Visual Basic and this extension was replaced by VBPROJ.