title: Abort setup accourding function returned value using InstallShield Spring
body: <p>I'm trying to setup a simple application using InstallShield 2012 Spring, 
  and in a certain point of installation I want to check the free disk space accourding to proceed or exit the setup.</p>
  
  <p>So, my main doubt is how can i exit the installation according a returned value from a method in a DLL ?</p>
  
  <p>I define a c# custom action to be executed "After File Transfer" but I dont know how to exit the setup</p>