From a table i am able to take cols count,rows count etc, but when i tried to get the selected row, it's throwing the message as "Opeation not appropriate for the widget class".can anyone explain me about widget class.. ans what is the root cause for this???

Scenario -> in my table 3 rows and two colums are there, in the first column so many check box has placed and after the selection of check box ,i just want to get the information in which all row check box ha been selected???

thanks in advance