instance_id_get

With this function you can get the unique ID value of any instance from the currently active instance list. You give the index in the instance list to get the ID from and the function will return the value for storing in a variable.

Syntax:

instance_id_get(index);

Returns:

Object Instance

Example:

for (var i = 0; i < instance_count; ++i;)
{
    var temp_id = instance_id_get(i);
    with (temp_id)
    {
        speed += 0.1;
    }
}

The above code will loop through all instances within the room and add 0.1 to their speed.