I have a project and within two applications.
1 - I have a main application, and it got a button that will call my other application, which is within the same project.
2 - I do not intend to use the states, by mixing the code too.
3 - Is there a way to create a call to another application is similar to what is done in PopUpManager?
Does the called component have to be an Application. If not, you can create a cutom component (extending from any other Flex container except Application) that holds everything you require and instantiate in your original Application on the Button Click.
If you must have an Application, you can create a separate project for the second application and compile it into a SWF. You can then load this SWF from the SWFLOADER Flex control on Button Click.
is not the solution but may be an alternative