i tried using form load event to populate the data in a listbox, Data successfully populated but as the code page form is a child form of another master form(main). the opening of child form starts with the load event of main form. In the main forms’ ‘Ok’ button clicked event there is a login data validation occures and so a Try..Catch..finally…End try used. This try..catch throws argumentexception error. Please provide me any solution here