TextField as3 getting the input

TextField as3 getting the input

i have a problem witch i cant solve, and i wanted to ask what am i doing
wrong. The idea should be that when i create the textfield i want to read
from it, but it doesnt
function click2(e:MouseEvent):void{
e.currentTarget.removeEventListener(MouseEvent.CLICK, click2);
fx=e.target.x+400;
fy=e.target.y+300;
var i:int;
i=2;
trace(str);
trace(e.target.name);
var line:Shape = new Shape();
line.graphics.lineStyle(1,0xFF0000,2);
line.graphics.moveTo(sx,sy);
line.graphics.lineTo(fx,fy);
this.addChild(line);
var inputField:TextField = new TextField();
inputField.border = true;
inputField.type = TextFieldType.INPUT;
inputField.width = 23;
inputField.height = 18;
inputField.x = (sx+fx)/2;
inputField.y = (sy+fy)/2;
inputField.multiline = false;
inputField.maxChars = 3;
inputField.restrict = "0-9";
str=inputField.text;
addChild(inputField);
}
In this code i create a line, and near it appears a textfield , where you
need to input the value of the line, but i can`t get it , when i want to
trace the STR value, it is null,the text should be written by the user and
i should read it ...