'宣言
 
Public Function MeasureString( _
   ByVal s As System.String, _
   ByVal font As Font, _
   ByVal layoutArea As System.Drawing.Size, _
   ByVal format As StringFormat _
) As System.Drawing.Size

public System.Drawing.Size MeasureString( 
   System.string s,
   Font font,
   System.Drawing.Size layoutArea,
   StringFormat format
)

The MeasureString method is designed for use with individual strings and includes a small amount of extra space before and after the string to allow for overhanging glyphs. Also, the DrawString method adjusts glyph points to optimize display quality and might display a string narrower than reported by MeasureString.