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User interface
User interface
Windows and forms in programs
Understanding windows and forms
OPEN WINDOW
Creates and displays a new window.
CLOSE WINDOW
Closes and destroys a window.
CURRENT WINDOW
Makes a specified window the current window.
CLEAR WINDOW
Clears the contents of a window.
OPEN FORM
Declares a compiled form in the program.
DISPLAY FORM
Displays and associates a form with the current window.
CLOSE FORM
Closes the resources allocated by
OPEN FORM
.
CLEAR SCREEN
Clears the complete application screen.
DISPLAY AT
Displays text at a given line/column position in the current window.