GetTextExtent don't detect the font size

Hi,
I need use GetTextExtent and I don't understant why GetTextExtent always return the same value if I change some values of the selected font. This is my example:

Code:

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LOGFONT lf;
        pOldFont->GetLogFont(&lf);

        CString sExampleSizeByChar;
        sExampleSizeByChar = _T("hello");
        DWORD dwPixelsByChar = dc.GetTextExtent(sExampleSizeByChar).cx / 1.15;

// I change the font size

        lf.lfHeight = lf.lfHeight + 10;
        lf.lfWidth = lf.lfWidth + 10;

        CFont* pFont = new CFont;
        pFont->CreateFontIndirect(&lf);

        dc.SelectObject(pFont);

        dwPixelsByChar = dc.GetTextExtent(sExampleSizeByChar).cx / 1.15;

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Why I get always the value 24 when I call GetTextExtent if I change the font size?

Thank you very much.

What is the dc?
Did you select the proper font in it before your first call of

Code:

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        DWORD dwPixelsByChar = dc.GetTextExtent(sExampleSizeByChar).cx / 1.15;

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What does the CreateFontIndirect(&lf) return? TRUE or FALSE?

LOGFONT

You need to see how many points it makes when you add 10 pixels to font height. I doubt the system feels any difference while mapping to an existent font.

Quote:

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Originally Posted by Igor Vartanov

LOGFONT

You need to see how many points it makes when you add 10 pixels to font height. I doubt the system feels any difference while mapping to an existent font.

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Yes, you are right, the code was working correctly. I have changed 10 to 50 and I can see the difference in the return value of function GetTextExtent.

Thank you very much for your replies.