I'm sorry, but rather than you wasting your time waiting for an answer here, I'd suggest that you aren't going to get an answer here. Your best bet for an answer on this would be to search the support forums on SAP, and to try searching through Google.
*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington
Difficult to say without more info. You'd probably need to get the info from SAP somehow (with the SAPdotnetconnector3.0 I assume), but you should check the documentation and/or sample code of that tool for more info. It could push the info or it could pull the info.
If you finally receive the info you can build "object classes" of the info you received and bind the properties of those classes (which you put in collections) to the grid.
You'll need to be more specific and give more specific problems if you want an answer. If I would answer this one best I could I'd need to research several hours or longer and write quite a lot of text.