Plz Help me regarding creating tables on WDynpro

Hi SDN's, plz help me. its very urgent. plz. my query is....

I m Having EMP ID and EMP NAME in first screen.

EMP ID should fetch da data frm backend(R/3) by using a table employee_getlist(say) so, when i select a perticular EMPID frm drop down list box, i wants to display EMPNAME in the corresponding inputfield. All this stuff i wants to create on Webdynpro's using Java. Not on PDK. So, plz could u findout the answer and reply me. Here i found a concept called Value Help, but that was not fetching da data frm backend. dat data was providing manually. so, plz guys, i hope i will get a positive response.

Thanks in Advance.

Regards,

Rajesh Reddy S