Member variable XbpWindow():tabStop Foundation
Allows the Xbase Part to be accessed during navigation with the Tab key.
By default the instance variable :tabStop contains the value .F. (false) and the Xbase Part is ignored during navigation using the tab key. When the value is .T. (true), focus can be set to the Xbase Part when using the Tab key.
If the parent of the object is an instance of the XbpCrt class, Tab key management is performed only if XbpCrt:useShortCuts is set to .T. (true)!