Insert Button control inside ASP.Net GridView Pager

I have a Gridview with paging buttons. i want to add my custom asp.net button along with paging. something like below in the same line

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I want to implement export functionality. Since I don't have space in grid header i want to make use of paging space. Let me know if that is possible

I m using custom paging and need to add the button in same paging row