AV when sending EM_CHARFROMPOS to TRichEdit

Hi all,

Using D7 I have a TRichEdit and I want to retrieve the char on which I clicked.
According to Win32 help this can be done with:

  SendMessage(RichEdit1.Handle, EM_CHARFROMPOS, 0, LPARAM);

where LPARAM is a LongRec containing x and y cooridinates.

For a plain edit this works OK, for a richedit this causes an AV
in procedure TWinControl.DefaultHandler(var Message);
when calling this line: (Delphi 7 source Controls.pas)
          Result := CallWindowProc(FDefWndProc, FHandle, Msg, WParam, LParam);

Is this a known bug?
Any workaround?

Thanks in advance,

Gerrit Beuze
ModelMaker Tools