List all variables. No value is returned. Open a window with upper left corner at row , column and size nrow , ncol . If nline is specified, then that many lines are allocated for the text buffer. Otherwise, the default buffer size is used.
Label is the label string.
The created window's identifier is returned as a number. The strings are actually given to the window as input. No value is returned. Default is the current window. These variables are for information only.