View:Fields: private: array
  All database fields to handle information in form of:
  Fields:={}
  AAdd( Fields, {cLongName,cShortName,cAlias,cField,cPicture,bWhen,bValid,;
                 [nMemoRowSize,nMemoColSize,[bDoGet]} )
  ...
Where:
  cLongName    - is the fieldname for Form mode
  cShortName   - is the fieldname for Browse (Columun header)
  cAlias       - is Alias() of fields database
  cField       - is a fieldname
  cPicture     - is a display mask
  bWhen        - is a code block evaluated before entering this field, when
                 returns false the field aditation is disabled. It can be
                 used for result fields, or read only fields.
  bValid       - is a code block to validate the entered data, when returns
                 true the data is valid.
  nMemoRowSize - window height for memo file (number of rows)
  nMemoColSize - window width for memo field (number of columns)
                 The memo field is edited in its own window of this sizes.
  bDoGet       - is a code block to edit the field, if nothing is set the
                 DoGet() method of DBrowse class is used.