Gets or sets a value that indicates whether clicking on an already selected object while the MultiSelectModifierKey is pressed should de-select it.
true if clicking an already selected object while the MultiSelectModifierKey is pressed should de-select it; otherwise, false. The default value is true.
When a selected object is clicked over with the pointer while the MultiSelectModifierKey is pressed, then its selection state must be inverted and become un-selected.
This behavior is used when the value of EnableDeselectObject is the default of true. Older versions of LEADTOOLS will not de-select the object if clicked on while MultiSelectModifierKey is pressed. If this behavior is desired, then set the value of EnableDeselectObject to false.
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Help Version 19.0.2017.3.22
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