Editable datawindow

Hi,

1. How can we edit data in a datawindow of any type(tabular, gird,freeform etc.)?

I have taken one datawindow as tabular and i am displaying empolyee info in it. I want to perform add/edit/delete operation in the grid itself like:

when i click add it should enable all the grid columns and allow to add new record in the grid. When i click on edit it should enable all the columns and to edit any value. when i click delete it should delete current record.

How can i implement this in PB 8.0.1 datawindow?

2. Also i have taken one field in the dw as checkbox. but when i click on the checkbox runtime. It is not changing the value as checked or unchecked. like the checkbox is not activating.

how i can activate the checkbox in dw?

please tell me what are the various ways to design editable datawindows?

i searched a lot on net but i didn't get sufficient info abt. this.

please reply ASAP

Thanks