Because the System.Drawing.Font object is immutable (meaning that you cannot adjust any of its properties), you can only assign the Font property a new Font object. However, you can base the new font on the existing font.
If the IsFontAmbient property returns true, then the value of the Font property is inherited from its parent.
To reset the value of the Font property to its default value, DefaultFont, the ResetFont method must be called or a null reference (Nothing in Visual Basic) assigned to the Font property.
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2