How to get the value of dynamically created checkbox in asp.

Question

Hi,

This is sridhar,i m adding checkbox controls dynamically in asp.net gridview like this
CheckBox cb = new CheckBox();
cb.EnableViewState = true;
cb.ID = "chkbox" ;
GridView1.Rows[j].Cells[mcount].Controls.Add(cb);
and i want to access that checkbox is checked or not on button click event....

Any one Help me...

With Regards
S.Sridhar