Control is active when keyboard focus is in the control or the subtree of the control, or in the subtree of the popup whose target/parent is set to this control, or the sub popup chain of the popup whose target/parent is this control.

For example, when keyboard focus is in the context menu opened in a GrapeCity.Windows.InputMan.GcDateTime, it's active; when keyboard focus is in the context menu of the drop down calculator of the GrapeCity.Windows.InputMan.GcNumber, it's also active.

Move focus to html control or leave browser, IM control's IsActive still is true ( for editor controls, its display text doesn't show, side buttons whose visibility is set to ShowOnFocus still shows).