isCaptionVisible(): Boolean;
The isCaptionVisible method of the Form class returns true if the caption of a form (or the top portion of a form with no caption) is visible on at least one monitor.
If you have multiple monitors in various configurations, saved or predetermined positions can leave a form inaccessible.
For a non-MDI form, this method returns true if a significant part of the caption is visible in the work area of at least one monitor. For an MDI form, this method returns true if a significant part of the caption is visible within the client area of the MDI frame.