The Microsoft run-time library now contains several QuickWin functions that make it possible to compile non-Windows DOS programs as simple text-only Windows applications. DOS programs compiled with the /Mq compiler option have a limited Windows user interface, including a standard menu bar, standard online help (for the QuickWin features), and a client (or application) window with a child (document) window for the C input/output streams stdin, stdout, and stderr. You can also add other child windows of your own. QuickWin applications support the Windows Clipboard, and you can use standard C functions to write to and read from a QuickWin application's windows, which behave as streams. Functions that are QuickWin compatible are marked as QWIN in the compatibility section.