It was the Win32 replacement for the DCI and Win G APIs for Windows 3.1.Direct X allowed all versions of Microsoft Windows, starting with Windows 95, to incorporate high-performance multimedia.Since Windows 95 was itself still new and few games had been released for it, Microsoft engaged in heavy promotion of Direct X to developers who were generally distrustful of Microsoft's ability to build a gaming platform in Windows. John, the evangelist for Direct X, staged an elaborate event at the 1996 Computer Game Developers Conference which game developer Jay Barnson described as a Roman theme, including real lions, togas, and something resembling an indoor carnival.It was at this event that Microsoft first introduced Direct3D and Direct Play, and demonstrated multiplayer Mech Warrior 2 being played over the Internet.The Direct X team faced the challenging task of testing each Direct X release against an array of computer hardware and software.
Windows 98 and Windows NT 4.0 both shipped with Direct X, as has every version of Windows released since. While the runtimes are proprietary, closed-source software, source code is provided for most of the SDK samples.
Direct3D is also used by other software applications for visualization and graphics tasks such as CAD/CAM engineering.