Display of variant in ALV .
I need to see if any variant is selected or not
if it is selected , I need to display in the top of page of ALV
I think u r going to check whether a variant name is given in the selection screen or not. If it is then u need to check it's validity. If it is true then u can use the Fm REUSE_ALV_VARIANT_EXISTENCE to check the validity of the variant.