1. In order to not show console window at startup, add
   
    /SUBSYSTEM:WINDOWS /ENTRY:mainCRTStartup
    
     to the link options, as, i.e :
    
     LDOPT             = -opt:ref /SUBSYSTEM:WINDOWS /ENTRY:mainCRTStartup
    
     but only when creating executable (not DLLs or libs).
    
2. To add win32 icon(s) to the executable, add this to makefile :
     ...
     YOURAPPRC              := yourapp.rc
     YOURAPPRES             := yourapp.res
     ...
    
     $(YOURAPPRES)   :   $(YOURAPPRC)
                    rc -DBUILDNUMBER=0 -r -fo $(YOURAPPRES) $(YOURAPPRC)
    
     $(YOURAPP)   :   $(YOURAPPO) $(YOURAPPRES)
                   $(LD) $(LDFLAGS) $^ $(GLIBS) $(OutPutOpt)$@
                   @echo "$@ done"
    
     with yourapp.rc containing :
    
     #include <winver.h
    
     YOURAPP_ICON                      ICON                                     "youricon.ico"
     YOURAPP_ICON2                     ICON                                     "youricon2.ico"
     YOURAPP_ICON3                     ICON                                     "youricon3.ico"
     ...
    
     This allows to associate icon to executable, visible in windows explorer, and when creating shortcut on desktop.

            See also Axel Naumann's site at: http://www.muenster.de/~naumana/root.html
            and François-Xavier Gentit's site at: http://gentit.home.cern.ch/gentit/rootandvisual7/