Re: C++ type conversion question

Thanks to all for the help.

-----Original Message-----
From: Discussion relating to the specifics of the C# and Managed C++
languages [mailto:[email protected]] On Behalf Of Efran Cobisi
Sent: Tuesday, December 05, 2006 1:29 AM
To: [email protected]
Subject: Re: [DOTNET-CX] C++ type conversion question

Alex,

Since a TCHAR* may already point to a WCHAR*, dependening on the Unicode
support for your project, it is necessary to split the code execution.
If the project is compiled with Unicode support (UNICODE is defined),
then the WCHAR* could be safely assigned to the TCHAR*. Else a
conversion is required to convert the single byte string to the Unicode
one: MultiByteToWideChar (1) should perform what you are looking for.

--------8<-------

    TCHAR* sTest = _T("Hello");
    WCHAR* wsOutput;

#ifdef  UNICODE
    // sTest is already a wide char string

    wsOutput = sTest;
#else
    // Obtain the length the output buffer will be.
    // Note I'm using the current code page to perform the conversion.

    int iOutputLen = MultiByteToWideChar(CP_ACP,
        MB_PRECOMPOSED,
        sTest,
        -1,
        NULL,
        0);

    wsOutput = new WCHAR[iOutputLen];

    MultiByteToWideChar(CP_ACP,
        MB_PRECOMPOSED,
        sTest,
        -1,
        wsOutput,
        iOutputLen);
#endif

--------8<-------

1)
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/intl/unicod
e_17si.asp

HTH,

Efran Cobisi
http://www.cobisi.com

Alex Smotritsky wrote:
> I have a TCHAR* referencing a string and I want to get that data into a
> WCHAR []
>
>
>
> How do I do that?
>
>
>
>
>
>
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