Each gadget with a non NULL MUIA_ExportID will get its contents saved during MUIM_Application_Save and restored during MUIM_Application_Load. This makes it very easy to design a configuration window with ''Save'', ''Use'' and ''Cancel'' buttons to allow the user storing the settings. When the application starts, you would just have to call MUIM_Application_Load and the stored settings will be read and installed.
Not all classes are able to import and export their contents. Currently, you may define MUIA_ExportIDs for
| String class | - | MUIA_String_Contents is ex/imported. |
| Radio class | - | MUIA_Radio_Active is ex/imported. |
| Cycle class | - | MUIA_Cycle_Active is ex/imported. |
| List class | - | MUIA_List_Active is /ex/imported. |
| Text class | - | MUIA_Text_Contents is ex/imported. |
| Slider class | - | MUIA_Slider_Level is ex/imported. |
| Area class | - | MUIA_Selected is ex/imported |
| (e.g. for Checkmark gadgets) | ||
| Menuitem class | - | MUIA_Checked is ex/imported (V9). |
| Group class | - | MUIA_Group_ActivePage is ex/imported (V8). |