Use Inkey - it acts like a textbox. In the manual lookup "Inkey" and it will have all the help you need Or this may help:

String EntryString;
..

Text DisplayText
{
Pos_X = 5;
Pos_Y = 5;
Layer = 1;
String = EntryString;
}

Then in the appropiate spot add (and make the TEXT visible also):

Inkey(EntryString); // wait until [enter] pressed
if (result == 13)
{
//Do something here
}

It is NOT tested but hopefully works

Adoado.