Experimental feature to automatically load a functions from standard library.
#UseStdLib OnOff
When parameter is omitted, it defaults to On. On/1 = load functions from standard library automatically if unset variable is found, Off/0 = don't load functions from standard library automatically, #include must be used.
The search order is UserLib -> Resource LIB -> WinApi.
#UseStdLib MyFunc() ; a function in standard library