I'd just call the relevant Windows API, which in this case appears to be 
GetTextExtentPoint32().

http://msdn.microsoft.com/en-us/library/dd144938(v=vs.85).aspx

HTH

Stephen Posey
stephenlpo...@earthlink.net 


-----Original Message-----
>From: Peter Kapas <pka...@sbcglobal.net>
>Sent: Nov 1, 2011 12:20 PM
>To: delphi@elists.org
>Subject: D4 Canvas.TextWidth question
>
>Hi,
>
>How to solve the bug of D4 for TComboBox.Canvas.TextWidth. It does not work. 
>Of course it works in D7 and above, but I have only D4. Is there some function 
>to get CharWidth for any different Fonts?
>
>Thanks,
>Peter
>
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