[Bug 794] New: - WINPROC_UnmapMsg32ATo32W returns incorrect value for WM_GETTEXTLENGTH

[wine-bugs at winehq.com]

http://bugs.winehq.com/show_bug.cgi?id=794

           Summary: WINPROC_UnmapMsg32ATo32W returns incorrect value for
                    WM_GETTEXTLENGTH
           Product: Wine
           Version: CVS
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: wine-gui
        AssignedTo: wine-bugs at winehq.com
        ReportedBy: winebugzilla at sun.consumer.org.il


When unmapping WM_GETTEXTLENGTH, the result is quite simply doubled to account
for cases where an MBCS character will take two bytes. This yeilds incorrect
results most of the time.

We need to do either one of:
A. Make sure this unmapping is unnecessary (almost always a result of internal
A->W conversions).
or
B. Perform internal messaging to find out what the number should really be.

The problem is that at the time of processing the WM_GETTEXTLENGTH, the function
has no way of actually knowing the real length, as it doesn't have the actual
string.

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