Re: [Dev-C++] strings for win32 (ABOUT UNICODE)

[Giuseppe F. <egi...@ti...>]

  ----- Original Message -----=20
  From: Tomas Dolejsi=20
  To: dev...@li...=20
  Sent: Saturday, September 15, 2001 7:44 PM
  Subject: RE: [Dev-C++] strings for win32 (ABOUT UNICODE)


   Hi Guiseppe!

  I learned a little about unicode and Win32 API. Let me share this with =
you.
  Win32 contains both ASCII and wide char modifications of functions =
that require text parameter(s).

  e.g.
  There's no entry point in the USER32.DLL for the function called =
MessageBox.
  Instead, there are two others. MessageBoxA (for ascii) and MessageBoxW =
(for wide chars).
  But you don't need to worry about it.
  Simply use MessageBox function.

  How all this works?

  The real functions are defined in WinUser.h exactly that:
   int WINAPI MessageBoxA (WHND hWnd, LPCSTR lpText, LPCSTR lpCaption, =
UINT uType) ;
   int WINAPI MessageBoxW (WHND hWnd, LPCWSTR lpText, LPCWSTR lpCaption, =
UINT uType) ;

  Beside this definitions, you'll find there following code:
   #ifdef UNICODE
   #define MessageBox MessageBoxW
   #else
   #define MessageBox MessageBoxA
   #endif

  It means that if you the call MessageBox function the MessageBoxA =
function will be called,
  unless you insert this line
   #define UNICODE
  in the beginning of your own code.

  It is the same with other text based functions (TextOut, sprintf, =
fprintf, strlen, strstr, atc.)

  There's a pice of my code I work on

    MessageBox(hWnd, "Furcadia Character Description Editor\nCopyright =
=A9 2001 Tomas Dolejsi\nVersion 1.01 (Freeware)\n\nCompiled with DevC++ =
4 ", "Fcde", MB_OK);

  If you want to use the UNICODE (wide char) instead of ASCII, adding =
the line #define UNICODE is one thing. You also need to convert all text =
(and char) constants you give the functions as the parameters. The =
converison is carried out with L key (e.g.   wchar_t * pw =3D L"Hello!"  =
 .) Type wchar_t is unsigned short. There's a macro TEXT() which =
converts the given text if UNICODE directive is defined.=20

  TEXT() macro is defined in WinNT.h:=20

  #ifdef UNICODE
  #define TEXT(q) L##q
  #else
  #define TEXT(q) q
  #endif

  That's all from me. I also attach a simple dialog example (originaly =
from Ch. Petzold's Programing Windows).

  Best luck!



  Hi Tomas. The code compile in my computer too.=20

  Thanks for your help.=20

  Giuseppe