How to access Input type="Checkbox" control inside (Dev Express) at server side(c#)

I have a dx:ASPxGridView (Dev express gridview) which contains HTML checkboxes - input type="checkbox" control. Problem is how can i access these HTML checkboxes at server side, so that i can check those checkboxes according to condition.

Please suggest me how can i access these HTML checkboxes on server side.

Code image can be found here

Thanks Girish Rawat