I wanna start functions after web page completely comes out.

Hi,

https://community.smartbear.com/t5/TestComplete-Questions/TestComplete-Verify-if-a-web-page-loads-with-all-images-and/m-p/227973/highlight/true#M100414 might help. (I.e. you should wait either until all background asynchronous scripts on the page stop running or explicitly search for the web element that your test code needs to work with and wait until this web element appears or timeout occurs (consider .WaitXXX() methods for this).)