[Bug 45136] New: Wine does not behave as Windows when using TBM_SETPAGESIZE call before TBM_SETRANGE

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=45136

            Bug ID: 45136
           Summary: Wine does not behave as Windows when using
                    TBM_SETPAGESIZE call before TBM_SETRANGE
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Mac OS X
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: comctl32
          Assignee: wine-bugs at winehq.org
          Reporter: patrick.maillot at gmail.com

The TBM_SETPAGESIZE message can be called before a TBM_SETRANGE message in
Windows and this will not affect the value or behavior of the TBM_SETPAGESIZE
parameter.

Wine's function 'TRACKBAR_SetRangeMin', at line 1288 of file
https://github.com/wine-mirror/wine/blob/master/dlls/comctl32/trackbar.c force
sets the Wine 'lPageSize' value ( infoPtr->lPageSize = (infoPtr->lRangeMax -
infoPtr->lRangeMin) / 5;). So when TBM_SETRANGE message is sent after a
TBM_SETPAGESIZE  message, the TBM_SETPAGESIZE parameter is reset. This is not
the Windows behavior.

A quick fix is to ensure in Windows one always calls TBM_SETPAGESIZE parameter
after TBM_SETRANGE. A better fix would be not to force update the lPageSize
variable in the TRACKBAR_SetRangeMin function.

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