How to pass ascx.cs value to aspx.cs file

Hi Everyone,

 

Thanks in adavnced !!!

 

I have two web forms one is ascx page and aspx page, i've implemented the autocomplete extender in my ascx page and now i want to get the id of the selected item and pass that selected item id from ascx.cs to aspx.cs file  so the already selected item will not shown again in other panel serach textbox . 

 

Please help me to understand how i can achieve this .

 

Thanks