AVWizard script based user callable events

At events the possible actions that user may do:

 - $skip 

Does nothing, skipping the default event.

 - $previous

Close the current screen (page) and go to the previous one

 - $next ['FileName']

Save the current items on the selected page. FileName is used to skip some steps in the wizard. If the wizard is in “One-Page mode” will finish the settings right here.

 - $call 'scriptname' 

Calls one system command;

 - $focus CaptionControl

Focus the control that has the caption selected one. For ListBox the caption is ListBox1, etc.