[Bug 6814] New: Selecting text with EM_EXSETSEL and RICHEDIT

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=6814

Summary: Selecting text with EM_EXSETSEL and RICHEDIT
           Product: Wine
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-gui
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

I often use EM_EXSETSEL to select the end of the text and then replace the
selection in order to achieve clear text appending. Here is my code (MFC but I
believe the idea is clear):

int len = logCtrl->GetWindowTextLength();
logCtrl->SetSel(len, -1); // here comes the problem WINE crash
logCtrl->ReplaceSel(text);

The control is RICHEDIT and WINE gives me:
run.c:193: ME_RunOfsFromCharOfs: Assertion `nCharOfs >= nParaOfs' failed.
wine: Assertion failed at address 0xffffe410 (thread 0009), starting debugger...

According to MSDN:
The CHARRANGE structure specifies a range of characters in a rich edit control.
This structure is used with the EM_EXGETSEL and EM_EXSETSEL messages.

If the cpMin and cpMax members are equal, the range is empty. The range includes
everything if cpMin is 0 and cpMax is —1.

They don't say -1 is always "the end" but that's how MS code works.