Designing Games with Game Maker - YoYo Games

Finally you can change the unique game id. This id is used for storing the highscore list and
save game files. If you release a new version of your game and don't want to take over the
old highscore list, you should change this number.
Constants
Under this tab you can define global constants that can be used in all scripts and pieces of
code, or as values for actions. Each constant has a name and a value. Names should follow
the same rules as variables, that is, they must start with a letter or underscore symbol and
further consist of letters, digits or underscore symbols. You are though strongly recommended
to make all your constants easily distinguishable. A usual convention is to use only capital
letters and underscores.
A value of a constant should be a constant expression. That is, it is either a constant number
or a string (with quotes around it) or it is an expression. The expression is evaluated before
anything else happens in the game. So it for example cannot reference the current room,
instances, or scripts. But it can contain the built-in constants and the names of resources.
You can append a constant at the end of the list using the button Append and delete it using
Delete. You can also insert a constant above the current selected constant. You can change a
constant name or value by clicking on it. There are also buttons to clear all constants, to move
them up or down in the list, and to sort them by name.
Including Files in Stand-alone Games
This functionality is only available in the Pro Edition of Game Maker.
As has been indicated before, you can create stand-alone versions of your game. Sometimes
your game will use additional files. For example you might want to include video files or text
files that are used in the game. In some cases you want to add DLLs or images and sounds
that are loaded during the running of the game. You can provide these together with the
stand-alone executable but it is sometimes easier to include them in the file. In this way only
one file needs to be distributed. Included files will default be exported when the game starts.
You can indicate the files you want to include in the executable in this tab of the game
settings. At the top of the form is a list of files to include. Use Add to add a new file to the list,