The Dos unit allows easy access to most of the functions provided by the
MS-DOS operating system from 32-bit protected mode application. Also Dos
unit emulates MS-DOS functions under OS/2 and Win32
using standard API, provided by OS/2 and Win32
operating systems. Operations such as find file, disk size or status,
time and date, get environment strings, and more are provided by the Dos unit.
In total, over 50 functions and procedures are available. For more information
about MS-DOS consult your DOS operating system reference manual.