$RESIZE questions

[TerryRitchie]

With $RESIZE:ON I've noticed that _WIDTH and _HEIGHT will not update when the screen is resized (which I assume is correct behavior).

_RESIZEWIDTH and _RESIZEHEIGHT do however as detailed in the Wiki.

Without $RESIZE:ON in the code I've noticed that _RESIZEWIDTH and _RESIZEHEIGHT report the same as _WIDTH and _HEIGHT. According to the Wiki the RESIZE command set should not be available without $RESIZE:ON.

Is _RESIZEWIDTH and _RESIZEHEIGHT reporting values without $RESIZE:ON a bug or is this expected behavior?

If this is not expected behavior and will get fixed (a bug) how can I detect when a program is allowed to resize? I would need to know to use _WIDTH and _HEIGHT when a window has a fixed size or use _RESIZEWIDTH and _RESIZEHEIGHT when a window is allowed to resize. I need to be able to incorporate this detection into libraries.

If this is expected behavior then why use _WIDTH and _HEIGHT at all? _RESIZEWIDTH and _RESIZEHEIGHT will always report the correct client _WIDTH and _HEIGHT whether $RESIZE:ON is present or not.

Any insights?