If you are using a RC file and you use a manifest file, then this change is required in the RC file:
If you link the old one (32 bits) by mistake, your EXE will not start and you will get an error that your app can't be executed
#ifdef __FLAT__
  1 24 "./WinXP/WindowsXP.Manifest"
#endif
#ifdef __64__
  1 24 "WinXP/WindowsXP.Manifest64"
#endifIf you link the old one (32 bits) by mistake, your EXE will not start and you will get an error that your app can't be executed