Communication from Applications to VxDs

Communication from Applications to VxDs VxDs do much more than just “handle” hardware. In most cases, VxDs also offer an interface to applications, so an application can actually do something with the hard­ ware. Both Windows 3.x and Windows 95 have mechanisms which allow VxDs and applications to communicate in both directions: application-to-VxD and VxD-to-appli­ cation. This chapter will cover communication in the application-to-VxD direction. The next chapter will cover VxD-to-application interaction.