The form’s sequence number in a display. A user-assigned number that can be used to control the tabbing sequence within the forms of a display.
An integer (0 to 999).
If FSN is set to 0, the software automatically resets it to match the Z-order (WdgZOrder) specified for the form. Accordingly, if all forms in a display are painted with FSNs of 0, then the Painter’s structure diagram automatically defines the tab order when WINDOW SET TABORDER BY TABINDEX is in effect. (BY TABINDEX is the default setting for graphic-class windows.)
FFSN, FormNum, WdgZOrder