Getting Controls in Controls code behind page

Question

I have created controls page (consider as 'controlpage.ascx') with html controls and given id's and added runat="server", but i can't able get that controls code behind('controlpage.ascx.cs').

Even tired with asp.net controls but can't able to get controls.
That controls are not populated in Designer page!
Can i know the reason why its not coming and also how to handle it.

Thanks in advance!