Message Box with yes or no button in web app

u just write this script and call this script from where u want to call or write event what to do

There's no standard asp control that will do this. You have a few choices:

- Javascript confirm (Which will only show Ok/Cancel)
- Design a custom control
- Use the AJAX control toolkit, by using a panel as your messagebox with the buttons you want, and have a ModalPopupExtender produce the dialog.