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Required
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5-21:
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Pressing the Cancel key stops current interaction in the following contexts:
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During a mouse-based selection or drag operation, it cancels
the operation.
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During a mouse-based scrolling operation, it cancels the scrolling
action and returns the system to its state prior to the start of the scrolling
operation.
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Anywhere in a dialog box that has a Cancel push button, it
is equivalent to activating that push button, except during a mouse-based
selection or drag operation.
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In a pull-down menu, it either dismisses the menu and moves
the location cursor to the cascading button used to pull it down, or unposts
the entire menu system. In a pop-up menu, option menu, tear-off menu, or menu
bar, it unposts the menu system.
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When the focus is in a torn off menu window, it closes the
torn off menu window.
These guidelines for the Cancel key ensure the consistent
operation of the key across applications.
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