xBase Commands
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  One of the great advantages of xBase is its sintax. Wayne Rattlif really
  did an excelent work designing a sintax with 'human language' for dBase.
  xBase commands are the highest level of abstraction on a OOPS architecture.

  xBase commands let us think only in functionality. When you need to
  quickly develop an application you should use xBase commands. Only when
  you plan to expand FiveWin is when you have to worry about the OOPS layer
  which is under xBase commands.

  Clipper 5 extraorninary preprocessor lets us apply a really easy Windows
  programming system based on xBase commands. Under xBase commands there
  are Objects and under them there are functions and data, and Windows
  API calls.

  Most of xBase commands are builted over Objects. When we write:

  DEFINE WINDOW oWnd FROM 1, 1 TO 20, 50

  really we are using Objects. But we don't have to worry about them.
  No need. xBase commands let us focus on what we want to happen and no
  about how things get done.