SUBSTRING FUNCTION IN FORMS 3.0

TO WHOMOVER KNOWS WHATEVER,     WOULD ANYONE KNOW IF THERE IS A SUBSTRING FUNCTION IN FORMS. WE BASICALLY HAVE A FIELD WHICH THE USER WOULD INPUT. HE WILL BE TYPING IN A "-" SOMEWHERE IN HIS FIELD. IT CAN BE IN THE THIRD POSITION XX-XXXX OR IT CAN BE IN THE FOURTH POSITION XXX-XXXX. HOW CAN I REMOVE THIS HYPHEN. THANK YOUR VERY MUCH Received on Thu Aug 13 1992 - 15:19:54 CEST