Gmail delete , read , unread , archive functionality

hi,
 
Please see the following url  
http://www.pageflakes.com/ 
In that they are displaying gmail functionality in the widget. It shows in the dropdown select all , deselect all , mark selected as read , mark selected as unread , delete selected. This functionality is updated in gmail via c#.net.
If i select delete selected the mail is selected in gmail via c# , i need this code, and also remaining mark selected as read , mark selected as unread , archive also i need for my project. how can i do this via in c# and its updated in gmail.
I also want same things with in the widgets. how can i do this? Is there any coding for this or any third party tool. Please help me any one.
 
Thanks & Regards
Alagar.M 
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