Populating record with data in filter

Hi Guys,

I have created a custom form having custom table( project Id, Worker, TransDate, Period from and Period to fields) as datasource.

I have a date filter in the form. Now if I filter the date, when I create a new record transdate field should be automatically populatedwith data in filter. I also have a project Id filter which should also work the same way. How can I achieve that?

Thanks in advance