System.Windows.Forms 2.0.0.0 System.Enum The enumeration defines a small set of standardized icons that can be displayed as part of a ToolTip. This is accomplished by setting the property of the class to one of the following values. Defines a set of standardized icons that can be associated with a ToolTip. Field System.Windows.Forms.ToolTipIcon An error icon 2.0.0.0 Field System.Windows.Forms.ToolTipIcon An information icon. 2.0.0.0 Field System.Windows.Forms.ToolTipIcon Not a standard icon. 2.0.0.0 Field System.Windows.Forms.ToolTipIcon A warning icon. 2.0.0.0