.DOB File Extension
Visual Basic UserDocument
| Developer | Microsoft |
| Popularity |
3.4 | 7 Votes |
What is a DOB file?
A DOB file is a Visual Basic UserDocument used in the development of ActiveX projects. It contains plain text data, including the project source code, definitions for the project's controls, and other relevant data needed for the application. While these files were integral to developing ActiveX applications in Visual Basic, the format became obsolete when Microsoft ended support for Visual Basic 6.0 in 2008.
More Information
Developers typically encountered DOB files while working within the Microsoft Visual Basic integrated development environment (IDE). During development, these files are created, edited, or saved as part of managing ActiveX controls and other user interface components. As ActiveX has declined in popularity, use of DOB files has decreased, though legacy systems may still require them for maintenance.
DOB files are specific to the structure and functionality of ActiveX controls, distinguishing them from other Visual Basic file types, such as Visual Basic Project (.VBP) and Visual Basic Form (.FRM) files. Developers maintaining older software projects may need to work with DOB files, but modern development environments have largely replaced them with newer solutions.
How to open a DOB file
You can open DOB files with Microsoft Visual Basic 6.0 as part of an ActiveX Document project. Open the associated Visual Basic project (VBP file), then select the DOB file in Project Explorer to view or edit its UserDocument source code.