Date Format Issue In VIEW

Hi

i have created 1 view and in my view i have datetime column adn i have converted it with my custom format by mere convert(column_name,6) and i am done then after when i tried to compare it with my textbox it is taking as string and when i tried to convert my date format to original format it is not allowing me so i have to put 2 duplicate column in my view i am sure there muct be some thing whcih i am not aware

First i have donbe this--> select convert(varchar,columnname,6)-- > 02 May 08

then try to compare it as date with View --> select * from ?<some table> where column_name='TEXT_BOX    not desired output

select * from ?<some table> where column_name which in base table='TEXT_BOX   i am done

 please give me some ideas

Thanks

Parth