n% = Gfa_LineCnt
line% = Gfa_TopLine
Gfa_LineCnt Returns the number of lines of the program.
line% = Gfa_TopLine returns the line currently at the top of the editor window.
Although the code for the Gfa_TopLine= assignment is present, a bug prevents its use.
An easy workaround is
' emulate Gfa_TopLine=
Gfa_Line = 1
Gfa_Line line%
{Created by Sjouke Hamstra; Last updated: 12/05/14 by James Gaite}