i have db with 3 tables

1. emp_master (emp_id, emp_name, emp_pasword)
2. task_master (task_id, task_name, task_starttime, task_completiontime, task_endtime)
3. task_status (emp_id, task_id, task_date,task_statusflag)

first i need a dataset for the above filled with data, next i want to generate an xml file for the above database, then i will send that xml file to mobile pc..

in mobile pc application, i need to generate dataset from that xml... and i will need to update the dataset... which will inturn update the xml file...

back in my pc i will use that xml file to update my database....

please give me code for this... i am unable to write by myself... because i am new to xml and dataset...

i need it urgent... help!!!!!