## Data input and output

ALERT() | Display a dialog box with a message
BROWSE() | Browse a database file
DBEDIT()* | Browse records in a table
OUTERR() | Write a list of values to the standard error device
OUTSTD() | Write a list of values to the standard output device
READKEY()* | Find out which key terminated a READ.
READVAR() | Return variable name of current GET or MENU
__AtPrompt() | Display a menu item on screen and define a message
__INPUT() | Stops application
__MenuTo() | Invoked a menu defined by set of @...PROMPT
__NONOALERT() | Override //NOALERT command line switch
__TYPEFILE() | Show the content of a file on the console and/or printer
__XRestScreen() | Restore screen image and coordinate from an internal buffer
__XSaveScreen() | Save whole screen image and coordinate to an internal buffer