The ColumnsChangingEventArgs type exposes the following members.
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Gets or sets a value indicating whether the change represented by this event is accepted.
Gets or sets the column which was changed. Can be null in case of Total change(Inherited from ColumnsChangeEventArgs.)
Gets or sets the addtional information of changed column. This property can be used for different purposes. For example for ChangeType.Remove events it contains index of removed column(Inherited from ColumnsChangeEventArgs.)
Gets or sets the value that indicates what part of the column was changed 0 - we don't know, 1 - expression, 2 - caption, 3 - sorting(Inherited from ColumnsChangeEventArgs.)
Gets or sets the attribute that shows what exactly was changed.(Inherited from ColumnsChangeEventArgs.)