AT clause

AT clause contains two integers which are the coordinates of the top left corner of the window relative to the 4GL screen.

Lines	A 4GL expression which returns the number of a line in the 4GL screen
Columns	A 4GL expression which returns the number of column on the specified line in the 4GL screen

The location of a 4GL window is relative to the entire 4GL screen but it is not dependant on the position of other windows and does not influence their position.

 

The coordinates of the AT clause can be represented by 4GL expressions that return positive integers which must fit these ranges:

• The first coordinate must be an integer from 1 to the maximum number of the lines of the 4GL screen. The window will begin at the line specified as the first coordinate
• The second coordinate must be an integer from 1 to the maximum number of the characters which the 4GL screen can contain in one line. The window will begin at the column specified as the second coordinate

 

The coordinates must be separated by comma. The example below opens a window on the second line of the 4GL screen at its second column (character).

OPEN WINDOW info_window AT 2,2 WITH 4 ROWS, 25 COLUMNS

 

The AT clause is obligatory regardless whether you open a window with form or without it.