Ok, the loop was due to constant setting of the buddy wndproc because the retrieve of the wndproc did not match. The match failed because the application program added a wndproc (its own) to the buddy window. The fix will be submitted to wine-patches. There are numerous other problems that this program displays but not associated with the UpDown control. The installer also has certain problems. License: X11 Changelog Guy Albertelli <<galberte@neo.lrun.com>> dlls/comctl32/updown.c - Set buddy window wndproc only once.
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