In wxCLIPS a dialog box is a convenient way of popping up a window with panel items, without having to explicitly create a frame and a panel. A dialog box may be modal or modeless. A modal dialog does not return control back to the calling program until the user has dismissed it, and all other windows in the application are disabled until the dialog is dismissed. A modeless dialog is just like a normal window in that the user can access other windows while the dialog is displayed.