[Bug 42010] ReactOS Calc does not show dots in radio buttons.

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=42010

--- Comment #6 from Dmitry Timoshkov <dmitry at baikal.ru> ---
(In reply to Dmitry Timoshkov from comment #5)
> 2. the problem with radio buttons is caused by broken logic in dlls/user32/
> button.c,BM_SETCHECK handler. In particular BUTTON_CheckAutoRadioButton()
> helper does weird things, simply disabling this call fixes the bug.

That happens because ros calc managed radio buttons state manually: and
it happens that it first turns on some button with BM_SETCHECK/1, and later
turns on another button in the same group with BM_SETCHECK/1, and the latter
one causes the first button to be turned off.

In my (pretty limited) testing I could observe something that resembles
what BUTTON_CheckAutoRadioButton() is doing only on user interaction, i.e.
with keyboard and mouse clicks. Perhaps managing button state programmatically
with BM_SETCHECK shouldn't lead to automatic button state handling in user32.

All of this needs quite a bit of test cases.

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