>Is there any way or any command which can trigger the field validation in the lost focus event.
>Puting the validation rule in lostfocus may not solve my problem if the user skip some fields(text boxes) by clicking on somewhere later part of the form while entering data and click on save thereafter.

might be, but i haven't seen it. when we have your requirements, we added a property to each field on the form. if this property was true, the field was required. before saving, a method would be called to verify that all 'required' fields were entered. if not, they would be returned to the first required field that wasn't entered. they couldn't save the record until all were met.