|w||The width of the grid to be created.|
|h||The height of the grid to be created.|
With this function you can create a new ds_grid data structure
of the specified cell width and height. This function returns an id
which must be used in all further functions that deal with this
mygrid = ds_grid_create(10, 10);
This creates a grid 10 cells high and 10 cells wide.