Question

char to TCHAR conversion

Asked by: spikey_nick

Hi,

    Could somebody explain what a TCHAR is and how I can convert a regular char and/or intergers into one.
I'm trying to have a message box that pops up with some numbers.

I tried using sprintf(), but that returns a regular char not a TCHAR.  The documentation that comes with eVC doesn't say anything about a TCHAR, or if it does it's hidden very well.

Thanks,
Nick

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Asked On
2003-08-08 at 11:52:55ID20704319
Tags

tchar

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char

Topic

Windows MobileProgramming

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Answers

 

by: _nn_Posted on 2003-08-08 at 12:15:52ID: 9110507

TCHAR is a macro. Depending on whether you compile with _UNICODE or not, it will generate either "wchar_t" or "char"
Normally, if you're using TCHAR, then you should use the _stprintf macro instead of the sprintf() function.

Now, since you're coding from WinCE, you most probably have _UNICODE defined, so use swprintf().

Finally, if you really need to convert a char[] or char* strings to unicode strings then have a look at the MultiByteToWideChar() API. See
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wcesdkr/html/_wcesdk_win32_multibytetowidechar.asp

or maybe more simply (untested) use a CString object to do the conversion :

(LPCWSTR)CString(szMyString)

 

by: spikey_nickPosted on 2003-08-08 at 12:33:45ID: 9110625

converting a char[] using MultibytetoWideChar() works, but when I try to use swprintf() I get the following error
           
           error C2664: 'swprintf' : cannot convert parameter 2 from 'char [6]' to 'const unsigned short *'
           (code) swprintf(errormsg,"%d,%d",m_x,m_y);

any ideas on how to fix this?
 

 

by: _nn_Posted on 2003-08-08 at 12:51:05ID: 9110729

Either

      (code) swprintf(errormsg,L"%d,%d",m_x,m_y);

Or

      (code) swprintf(errormsg,_T("%d,%d"),m_x,m_y);

Prepending L makes the literal a unicode one. The _T macro allows you to compile in both ANSI or UNICODE, but since you use swprintf explicitly, the first solution is th logical one.

20120131-EE-VQP-002

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