String types and conversions (TCHAR)

Code:

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void printText(HWND hWnd, TCHAR txt[], RECT& rc)
{
        PAINTSTRUCT pntS;

        HDC hdc = BeginPaint(hWnd, &pntS);
        TCHAR s[] = _T(txt);
        TextOut(hdc, rc.left, rc.top, s, (int)_tcslen(s));
        EndPaint(hWnd, &ps);
}

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Got an error...

Code:

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error C2440: 'initializing' : cannot convert from 'TCHAR []' to 'TCHAR []'

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It's complaining about

Code:

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TCHAR s[] = _T(txt);

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??

_T() is macro that takes a string-literal only - something in quotation marks.
Just call _tcslen(txt) directly.

gg

Quote:

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Originally Posted by Codeplug

_T() is macro that takes a string-literal only - something in quotation marks.
Just call _tcslen(txt) directly.

gg

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Isn't _tcslen just to get the length of the string?

What Codeplug is referring to is that you don't need to create another temporary variable, because txt is perfecetly fine to use where you are using s.

What the compiler is complaining about is actually that you are trying to copy one array into another. If you are going to copy a string, then you should:
1. not use the _T macro, as that's only for string literals (things that have quotes around it).
2. use _tcscpy() to copy the string.

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Mats