Saving GUIBuilder Files
The current GUIBuilder (.gbf) file is automatically saved whenever you exit from GUIBuilder, close the .gbf file, or open a new .gbf file. It is also saved every time you View, Build, or Run the generated program.
To save the file at any other time, do one of the following:
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On the File menu, select Save.
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On the toolbar, click the Save button.
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Press Ctrl+S.