BADi or exit for customer name change

Hi all,

i want to retrieve the customer details based on the name entered in the selection screen.

but the customer name is stored in the Database like combination of CAPITAL letters and small letters and Numbers and some special characters like -(Hyphen), .(DOT), etc.

Assume name is stored in the database like: RAJA RAM.

but the selection-screen , if the i enter raja ram, or Raja Ram, it should fetch from the database.

what i am thinking that at the time of customer creation , i want conver the customer name into either CAPITALS or Small letters.

for this is there any BADI or Exit is available.?

Thanks

Vimala.