Validation in module pool

Hi,

I had copied the spfli table as ZSPFLI and insert values through a module pool program. I have created a work area of type ZSPFLI and get values ino work area from program and then tried to insert/update it to the ZSPFLI. This method will notperform the checktable validations. How can I do check table validations to the field in the workarea.

Thanks in advance.