How to update the applicationbadge number when application is not running?

I have implemented APNS in my appli开发者_StackOverflowcation .

It works like a charm .

There is just one problem that i don't know how to update the badge number if two subsequent notifications come and the application is not yet launched .

suppose first time is 1 then 2 just like the mail application .

thanks

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This is not supported, not even with the "multitasking" feature in iOS 4.