Backgrounds
The following functions will give you information about a background:
background_exists(ind)
Returns whether a background with the given index exists.
background_get_name(ind)
Returns the name of the background with the given index.
background_get_width(ind)
Returns the width of the background with the given index.
background_get_height(ind)
Returns the height of the background with the given index.
In certain situations you might want to save the bitmap corresponding the background
to a file. For this the following function can be used:
background_save(ind,fname)
Saves the background ind to the file with the name fname. This must
be a .png file. Only available in the Pro Edition.