Function:
GetTextExtentPoint32(HDC hdc, LPCTSTR lpString, int cbString,
LPSIZE, lpSize)
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Description:
Determines the width and height of a specified string of
text using the currently selected font.
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Parameters:
hdc: Identifies the device context.
lpString: Points to the string of text. The string does not need to be
zero-terminated, since cbString specifies the length of the string.
cbString: Specifies the number of characters in the string.
lpSize: Points to a SIZE structure in which the dimensions of the string
are to be returned.
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Returns:
If the function succeeds, the return value is nonzero (the
width of the specified text string). If the function fails, the return
value is zero.
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Example: 
Click on the calc icon to view a sample of the GetTextExtentPoint32
function.
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