A tab control can optionally contain a client area. The client area is used to display controls associated with a tab.
If the client area is available (see ClientArea property), controls can be added to the tab control at design-time. As the user switches between tabs, the controls associated with each tab are shown or hidden. As controls are hidden because their associated tab is not the , the controls are not only hidden, but also disabled (using Visual Basic's Enabled property). This is fully automatic and requires no application intervention.
The tab order of the controls contained within the client area (or page) is defined using Visual Basic's TabIndex property.