The title of the window. Phat Sizes A WindowFrame, unlike a WindowBorder, has no limitations on the size of the border. Greater than 0, there is an icon. See greydient for an example. Do not omit this.
Icons are important.
The Window Frame to appear around message boxes. As Message Boxes can have large interesting borders for they are transient. These windows do not generally have many buttons, either. If you do not provide a definition for this object, WindowFrame will be used instead, but the caption for such a window will look larger than expected. You can generally ignore this, since a basic WindowFrame will do fine, most of the time.