SysAppLaunch - having app call other app for UI input

[Hardy Macia]

How do I do this?

"Opening Applications Programmatically" says  SysAppLaunch function... has
numerous options including whether to launch the application as a separate
task, wheather to allocate a globals world, and whether or not to give the
called application its own stack.

How do I use SysAppLaunch to allocate a globals world?

Will creating the globals world allow App2 to be called from App1, use some
App2 globals and then return control to App1?

- Hardy