From jo@ec|@ud|o@|@r|@ @end|ng |rom gm@||@com  Thu May  5 17:17:13 2022
From: jo@ec|@ud|o@|@r|@ @end|ng |rom gm@||@com (jcfaria)
Date: Thu, 05 May 2022 15:17:13 +0000
Subject: [Rd] Rgui.exe 4.2.0 does not receive characters via the Windows
 API's PostMessage function
Message-ID: <em26d64aef-2f66-415f-be9d-ae71a91c1d56@dell>

Hello,

Rgui.exe 4.2.0 does not receive characters via the Windows API's 
PostMessage function.

The Tinn-R project sends messages to Rgui.exe (SDI mode) via the Windows 
API's PostMessage function.
A simplification of the code (in object Pascal) can be seen below.

procedure TfMain.btnPasteClick(Sender: TObject);
var
   i: integer;
   sTmp: WideString;
   hBN: HWND;

begin
   hBN:= FindWindowA(nil,
                     'R Console (64-bit)');

   sTmp:= 'sd';

   for i:= 1 to Length(sTmp) do begin
     PostMessage(hBN,
                 WM_CHAR,
                 Ord(sTmp[i]),
                 0);
   end;

   PostMessage(hBN,
               WM_KEYDOWN,
               VK_RETURN, 0);
end;

This code has always worked fine for all versions of Rgui.exe with the 
exception of the last one released, ie 4.2.0.

We've been trying to get around the problem on the Object Pascal side, 
but without success so far.

Does anyone connected to the compilation of Rqui.exe know what the 
problem is?

Best,
///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\
Jose Claudio Faria
UESC/DCET/Brasil
joseclaudio.faria at gmail.com
Telefones:
55(73)3680.5545 - UESC
55(73)99966.9100 - VIVO
///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\
If you have software to deal with statistics, you have arms,
if you have good software, you have arms and legs,
if you have software like R, you have arms, legs and wings...
the height of your flight depends only on you.

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[Rd] Rgui.exe 4.2.0 does not receive characters via the Windows API's PostMessage function
jcfaria