Hi Mal ,
You do not need a VLOOKUP for this ; if you are saying that the logic is :
If target cell has any text , then return the word Reg , else ?
then a simple IF formula will suffice , though you will need to make use of the ISTEXT function.
If the target cell is A1 , then :
=IF(ISTEXT(A1) , "Reg" , "No text")
should be enough.
Narayan