I haven't played with IDL in a while (years) and am trying to do something simple..receive text from the user in a text box.   I tried to use : OBJ_NEW('IDLitToolbase')  result=oGUI->PROMPTUSERTEXT('PATIENT NAME',answer, TITLE='ENTER PATIENT NAME') Getproperty,answer=vPtname print, result print, vPtName  ...but no pop-up box ever appears and I get a runtime error  that vPtname is undefined---I'm obviously missing something simple here I created oGUI just to have a method of retrieving the text variable I want I'd apprecaite any help anyone has to offer Thanks, --Karen   oGUI->