Loading a swf from flex builder

Hi Everyone,

Hi have a project, in which three technologies are used :

1.) Action Script 3.0

2.) Adobe Flex

3.) Java

I want to know how do i load the swf file since i have various swf file in .fla file. Now how do i perform actions on swf file UI components like button.

For an example, like i have a loginpage.swf and i have to create a mobile application in flex and load this swf file initially.

Now the problems are :

1.) How to load the swf file from .fla file.

2.) How to perform actions on login button which authenticates the user.

Also please tell what is the way to send command to java from flex.

Thanks in advance. Please help.