Visual Test, originally known as MS-Test, was an automated testing tool for Windows applications developed by Microsoft and later sold to Rational Software. Overview MS-Test was developed for internal use in Microsoft but became a commercial product at the beginning of 1992. MS-Test automated the process of testing Windows applications. It combined a Windows development language, Basic, with a testing-oriented API. Tests known as scripts were written in Test Basic, a form of the BASIC programming language. The API was predominantly wrapped around Windows API functions. Test scripts could be created with capture/replay, in particular by the Windows Recorder tool. However its dominant strength was that scripts could be coded and compiled. Either an individual script could be run, or a group of them run in sequence by a test driver. Among the innovations for the test driver was the ability to customize the batch execution with the inclusion of custom-designed dialog boxes and menus, which were built with the User Interface Editor. Customers had to purchase Visual Test to develop scripts, but it offered free and unlimited redistribution of compiled scripts. The ability to use OLE Automation allowed enterprising individuals to expand beyond basic functional testing into load testing. A script could create tens of browsers, drive them, feed them with data, collect statistics and monitor the state of the test. Capabilities New capabilities were added over time. In 1992, new DLLs were added to provide support for testing: DOS VM Dynamic Data Exchange (DDE) The ability to run scripts remotely on other PCs of a local LAN An enhanced test driver Included with Visual Test was a suite of samples that demonstrated the range of capabilities of the product. Play the minesweeper game on its own. Play solitaire Sample screen saver and others 32-bit enhancements Version 2.0 in 1993 had provided support for Windows 3.1. In 1994 MS-Test version 3.0 advanced from 16-bit systems to 32-bit. With Version 4.0 in 1995, it was hosted within Visual Studio and renamed to Visual Test. It was able to support the testing of the new application control that arrived with Windows 95 and NT. The other development language, Visual Basic, remained hosted within its own separate development environment. With its inclusion in Visual Studio, versioning of scripts could be maintained with Microsoft Visual SourceSafe, also part of Studio. In version 4.0, the ability to access its capabilities from Visual Basic and