Input screen data into BLT

Hi Friends,

I want to develop a webpage, where user will do a data entry and clicks on submit button. Once the user clicks button, I want to pass those values into a BLT .I shall map incoming webpage(html) values with that of  a BAPI and will take BAPI response back with the results at the bottom.

I am aware how to call BAPI and take response from BLT .I Just want to know how to pass those screen fields into BLT. Can any one guide please.

Thanks,

Suman