When these errors are encountered a bell is sounded and the message flashed in the dialog window. Functions encountering non-fatal errors do not return a value. The first type represents the fixed files such as the specification files that are present at all times. Their main purpose is communication of information between processes. This is done because some servers will not let us create more than one colormap.
Some servers require the colormap to be created before the windows are created.
All nodes in a level can be horizontal only if one of the items has a vertical or horizontal menu underneath it. However there is a pixmap associated with the dialog window. When the dialog window is unmapped, the contents of the dialog window are written to a pixmap. Similarly when the dialog is mapped again, the contents of the pixmap are written back to the window. If the pixmap cannot be created, a proper error code is returned.