Load page first aspx page and process code behide last !

Hi every one !

I have trouble with speak in my page, I had put this code in page load, and run it that my websiteprioritized process codebehide( first speak, load aspx page last)

My page has delay and it wait process code speak, then load aspx contain html code !

Now I want my website load first aspx page and process speak last, How do make code ?

Thanks !