MFreeBitmap [FirstBitmap.w[,LastBitmap.w]] ; Free a Bitmap, range of bitmaps, or all bitmaps

Allows you to free a specific, all, or a range of chunky Bitmap objects. Chunky
Bitmap objects contain graphics and possibly stencil 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 range of objects to free it will
check that each one exists first and if not will generate an error.