This section is a reference guide to the My World 3 script language.

It is intended for the advanced editor, and will not concern most users.

NB throughout this section:

• $ denotes a string of characters (letters and numbers)
• % denotes an integer
• & denotes a hexadecimal number

Frame behaviour is defined by what a frame does in response to an event that
it receives.

Each frame can have a script file associated with it which lists what the
frame must do in response to an event. When a frame receives an event, it
calls a procedure whose name is directly related to the name of the event.

For example, if a frame receives a 'Foo' event then the script procedure
called 'OnFoo' will be executed.

In this version of My World, a frame can only receive the following events:

• "Load": all frames receive this event when a My World file is loaded
• "UnLoad": all frames receive this event when a My World file is unloaded
  (i.e. when either another My World file is about to be loaded to replace the
  current one or if My World is about to exit).
• "Open": all frames receive this event when the screen in which the frame
  belongs is opened.
• "Close": all frames receive this event when the screen in which the frame
  belongs is closed.
• "Click": the frame underneath the pointer receives this event when the left
  mouse button is clicked and there is no object being dragged.
• "Drop": the frame underneath the pointer receives this event when the left
  mouse button is clicked and there is an object being dragged.

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