> From: giannis.adamopoulos@reactos.org
> To: ros-dev@reactos.org
> Date: Thu, 17 Nov 2011 11:53:41 +0100
> Subject: Re: [ros-dev] SendMessageW doubt/bug with ANSI LPARAM.
>
> Hi,
> this is still not correct. SendMessage is not a function but a macro. When the PROGRAM is compiled as unicode SendMessage is translated to SendMessageW and otherwise it is translated to SendMessageA.
> Now regarding the convertion fron ansi to unicode or unicode to ansi, this is done when win32k calls user32 in the receiving process here:
> http://git.reactos.org/?p=reactos.git;a=blob;f=reactos/dll/win32/user32/windows/message.c;h=4e5e3430ced3df5242ace2f6c3725357ca01f024;hb=HEAD#l497
> and
> http://git.reactos.org/?p=reactos.git;a=blob;f=reactos/dll/win32/user32/windows/message.c;h=4e5e3430ced3df5242ace2f6c3725357ca01f024;hb=HEAD#l828
>
> ReactOS Development List <ros-dev@reactos.org> wrote on Thu, November 17th, 2011, 3:09 AM:
> > Thanks Timo for your explanation.
> > So let me see if I understood correctly.
> > When TC calls SendMessage(handle,CB_ADDSTRING,0,(LPARAM)ansitext); it could be translated to SendMessageW or to SendMessageA accordingly to the window(*) that receives the message:
> > -If the receiving window is ANSI the SendMessage is translated to SendMessageA and the Lparam is converted to ANSI(in this case there isn't needed any translation as it was originally ANSI).
> > -If the receiving window is UNICODE the SendMessage is translated to SendMessageW and the Lparam is converted(**),in this case, from ANSI to UNICODE, so SendMessageW is receiving an UNICODE string instead the original ANSI one.
> > Feel free to correct me if I am wrong.
> > My doubts are:
> > (*)When talking about the receiving "Window"...Which Window are we talking about in this particular case?Isn't the SendMessage supposed to be sent to the ComboBox window?
> > (**)If I understood correctly, the LParam originally ANSI is translated to UNICODE before being sent to the SendMessageW. Which function/macro does this translation?Just curious...
> > So the problem maybe is in the **p*rintf function that prints the line in the Combobox?
> >
> > Thanks again for your time
> > Víctor
> >
> >
> >
> >
> >
> > Date: Wed, 16 Nov 2011 21:14:07 +0100
> > From: timo.kreuzer@web.de
> > To: ros-dev@reactos.org
> > Subject: Re: [ros-dev] SendMessageW doubt/bug with ANSI LPARAM.
> >
> >
> >
> >
> >
> >
> >
> >
> > Am 16.11.2011 16:12, schrieb victor martinez:
> >
> >
> >
> > >The Total Commander comboboxes for the left and right drive list
> > >are Unicode. However, Total Commander calls
> > >SendMessage(handle,CB_ADDSTRING,0,(LPARAM)ansitext);
> > >to add items as ANSI text. This seems to work, but it's adding some
> > >extra text at the end.
> >
> > If I understand correctly, Total Commander is calling SendMessage, which in
> > this case is translated to SendMessageW (as the comboboxes are Unicode).
> >
> >
> > No, the fact that the combo boxes are unicode, doesn't mean TC is
> > calling SendMessageW, It could very well call SendMessageA and pass
> > an ansi string.
> >
> > If it passes an ANSI string to SendMessageW then it's doing it
> > wrong.
> >
> > The message is supposed to be translated accordingly when it's
> > passed to the recevier, based on whether the receiving window is
> > ANSI or unicode.
> >
> >
> >
> > The problem also doesn't seem to be ANSI vs unicode, but the "extra text at the end".
> >
> > First thought: someone forgot that UNICODE_STRINGs are not
> > neccessarily 0 terminated.
> >
> >
> >
> > Timo
> >
> >
> >
> >
> >
> >
> >
> >
> >
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