Web Forms Controls accessing in another class

Question

webform1 : page

{

 

   Page_Load

   {

              // Able to access controls like gridview1, label1,...etc

    }

 

}

 

AnotherClass

{

             // Not Able to access controls like gridview1, label1,...etc

} 

 

How to access the aspx defined controls in "AnotherClass" which was in same page.