unicode

radhika28

I want to add multilanguage support to my mfc application.How can i proceed with it. Thanks

Naveen

to give unicode support just define _UNICODE and UNICODE in the preprocessor definition of the project settings.

nave

Stephen Hewitt

And remove _MBCS.

Steve

Rajesh R Subramanian

Naveen R wrote:

just define _UNICODE and UNICODE in the preprocessor definition

Defining _UNICODE will implicitly define UNICODE.

Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

Naveen

thanks. I didnt know that. Can u tell me where it is defined?I mean which header file have the code for that?

nave

Rajesh R Subramanian

Stephen Hewitt wrote:

And remove _MBCS.

We don't need to remove _MBCS. If we remove it, we will lose MBCS support. Just to add unicode support, defining _UNICODE will be sufficient.

Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

Rajesh R Subramanian

Naveen R wrote:

I mean which header file have the code for that?

I don't know, but I am very sure about the point. Defining _UNICODE will implicitly define UNICODE too. I've been noticing sometimes people suggesting questioners to define both UNICODE and _UNICODE. But defining _UNICODE will suffice. I thought will point this out now.

Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

Naveen

u r right.. i found code like this in some header file #if defined(_UNICODE) && !defined(UNICODE) #define UNICODE

nave

Stephen Hewitt

Defining both _UNICODE and _MBCS may cause problems if you use "tchar.h". For example many people use the _T macro and the "_t" string functions so the same code can be used for Unicode and non-Unicode builds. Take the _tcscmp function for example. Here's a table from the documentation for this function:

TCHAR.H routine	_UNICODE & MBCS not defined	_MBCS defined	_UNICODE defined
---------------------------------------------------------------------------
_tcscmp	strcmp	_mbscmp	wcscmp

As you can see the results are not specified if both are defined. Already defining both leaves you in the reals of undocumented behaviour. In this case, with my header files, the Unicode version will be used. However, It's never a good idea to reply on undocumented behaviour in computer programming if you don't have a compelling reason. In general, I remove the _MBCS.

Steve