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Checked Attribute
The toggle box has an additional attribute that’s useful: CHECKED. The CHECKED attribute holds a logical value. The value is TRUE when the on-screen state of the widget is solid or checked. It’s FALSE when the on-screen state is empty. Although you can use either, using CHECKED instead of SCREEN-VALUE with toggle boxes creates more readable code. The following examples are equivalent, assuming that the solid state of the widget corresponds to YES:
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