Custom code on application initialize

To add your custom code on application initizlize (Credits to Justin Anderson):

• Create Search Screen
• From the Write Code drop-down, select <ScreenName>_CanRun from the Access Control Methods category. This generates an Application class with the <ScreenName>_CanRun
• Delete method <ScreenName>_CanRun and add Application_Initialize method
  
  Add this code in created clas to your check user permission
  
  partial void Application_Initialize()
  {    //Write your Custom code
  }
  
• Delete Search Screen (it is not needed anymore)