GUI line choice field problem

[Ambiguities]

unfortunately i ran into another snag.... with the recursive gui select box it displays all the students who were entered but im having issues with ChoseLine

i'm trying to work with just one variable from chose line which is the line number but i'm trying to access the pointer. my search function works to find the student but when i try and do it with the int it fails for all but the first and last cause it doesn't meet the requirements for the if statement

code:

procedure selectivedisplay (crp : ^student, count : int, var numcheck : int)         if count not= -1 then             numcheck += 1         end if         if root not= nil then             if crp -> ltp not= nil then                 selectivedisplay (crp -> ltp, count, numcheck)             elsif crp -> gtp not= nil then                 selectivedisplay (crp -> gtp, count, numcheck)             %i understand that the below code wont work but i'm unsure how to send a varaible through ChoseLine as GUI doesn't have much support documents for it.             elsif numcheck = count then                 put crp -> lname, ", ", crp -> fname             end if         end if end selectivedisplay % GUI procedure ChoseLine (line : int)     var x : int := 0     winID2 := Window.Open ("graphics:300;20,nobuttonbar,position:center+100;center")     selectivedisplay (root, line, x) end ChoseLine

i know global variables seem like a good idea but i want to avoid it at all costs

all of this is being entered from the previous thread

code:

var x : int := GUI.CreateTextBoxChoice (20, 20, 200, 100, 0, 0, ChoseLine)         showtreefull (root, x)