How can i control the new browser?

Hellow now i'm dealing with web browser automation test. 

What i wonder is 

How can i control about new browser window? 

The Testcase is 

I join the web browser, and the I click specific button. the new web browser poped up. 

and I working at the new web browser. 

but testcomplete's namemapping doesn't make new namemapping about my new web browser. 

so i can't run my automatino test at new web browser with testcomplete ........................................................