Instructions for windows and forms This section groups the language instructions to handle windows and forms. OPEN WINDOWCreates and displays a new window.CLOSE WINDOWCloses and destroys a window.CURRENT WINDOWMakes a specified window the current window.CLEAR WINDOWClears the contents of a window.OPEN FORMDeclares a compiled form in the program.DISPLAY FORMDisplays and associates a form with the current window.CLOSE FORMCloses the resources allocated by OPEN FORM.CLEAR SCREENClears the complete application screen.DISPLAY ATThe DISPLAY ... AT instruction displays text at a given line/column position in the current window.