'宣言 Protected Overridable Sub PropertyUpdatedOverride( _ ByVal sender As Object, _ ByVal propertyName As String, _ ByVal oldValue As Object, _ ByVal newValue As Object _ )
protected virtual void PropertyUpdatedOverride( object sender, string propertyName, object oldValue, object newValue )
PointerTooltip クラス PointerTooltip メンバ