FLrun
        
        FLrun — 
      Starts the FLTK widget thread.
          
       
      
        
        Description
        
      Starts the FLTK widget thread.
    
       
      
      
        
        Performance
        
      This opcode must be located at the end of all widget declarations. It has no arguments, and its purpose is to start the thread related to widgets. Widgets would not operate if FLrun is missing.
    
       
      
      
        
        Credits
        Author: Gabriel Maldonado
        New in version 4.22