GetTextWidth( hWnd, cStr, hFont )-> <nFontWidth>
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 PARAMETER:

  <hDC>     Is the handle that identifies the windows device context. If
            no hDC is given, GetTextWidth() will create one for the 
            active window, and release it after the operation.

  <cStr>    Is the string or char for that the pixel length is
            requested

  <hFont>   Is the font that cStr uses. If <hFont>  is not supplied,
            GetTextWidth() will use the selected font.


 RETURNS:

  <nFontWidth> is the pixel width of the specified string, based on the 
  given font.


 DESCRIPTION:

  This function allows you to determine the exact length of a string using a
  certain Font. This can be useful when you want to know if a string can be 
  completely written to a window without being 'clipped', or you want to
  size a MDI Window to the MDI Parent. 

 SOURCE:

  SOURCE\WINAPI\GETTEXTW.C