MFreeShape [FirstShape.w[,LastShape.w]] ; Free a Shape, range of shapes, or all shapes

Allows you to free a specific, all, or a range of chunky Shape objects. Chunky
Shape objects contain graphics and possibly cookie data, so if you free these
objects the data will be freed also. If you omit the parameters it will free
all objects unconditionally. If you specify a second parameter it will check
that each one exists first and if not will generate an error. Specifying a second
parameter will free a range of shapes.