When Xbox was developed, Microsoft used DirectX as the basis of the name Xbox to indicate the console was based on DirectX technology. Microsoft later coined DirectX to refer to all these APIs and the terminology has come to be used since then.
The names of APIs originally began with Direct – Direct3D, DirectMusic, DirectPlay, DirectDraw and so on. Microsoft DirectX, popularly known as DirectX, is a collection of Application Programming Interfaces (APIs) for handling tasks related to multimedia, especially game programming and video on Microsoft platforms. 3 Download and Install DirectX 12, 11, 10.