To open a new IDL GUIBuilder window, do one of the following:
Each of these actions opens a new IDL GUIBuilder window and displays the IDL GUIBuilder toolbar. The IDL GUIBuilder window contains a top-level base widget, as shown in the following figure. This top-level base holds all of the widgets for an individual interface; it is the top-level parent in the widget hierarchy being created.
To open an existing interface design in the IDL GUIBuilder:
*.prc portable resource file contains the widget definitions that make up the widget hierarchy and define your interface design. When you click Open, the existing definition is displayed in an IDL GUIBuilder window. You can modify the interface then save it, and you can generate new IDL source code for the modified definition.