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GetTextExtentPoint32 info  Overview  Group

The GetTextExtentPoint32 function computes the width and height of the specified string of text.

BOOL GetTextExtentPoint32(

    HDC hdc,

// handle of device context

    LPCTSTR lpString,

// address of text string

    int cbString,

// number of characters in string

    LPSIZE lpSize 

// address of structure for string size



Identifies the device context.
Points to the string of text. The string does not need to be zero-terminated, since cbString specifies the length of the string.
Specifies the number of characters in the string.
Points to a SIZE structure in which the dimensions of the string are to be returned.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.


The GetTextExtentPoint32 function uses the currently selected font to compute the dimensions of the string. The width and height, in logical units, are computed without considering any clipping.

Because some devices kern characters, the sum of the extents of the characters in a string may not be equal to the extent of the string.

The calculated string width takes into account the intercharacter spacing set by the SetTextCharacterExtra function.

See Also

SetTextCharacterExtra, SIZE

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