DbfValid(cName,oGet,cDbfName,[nOrder],bBlock,[lEmpty],[aFields])  --> true/false:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Functions:
~~~~~~~~~~
Current value Get:VarGet() is validated, if not valid the window with
valid data to select (from database cDbfName) is diplayed.Selected value is
written to Get object (Get:VarPut(..)). When validating of the Get:VarGet()
the database cDbfName is seeked. After the end of search is the status of
databases before the activating of this command restored.

Parameter description:
~~~~~~~~~~~~~~~~~~~~~~
cName:         displayed data window name
oGet:          clipper object of GET class
cDbfName:      seeked database alias name
nOrder:        if set then before the seek is the SET ORDER TO nOrder command
               performed(setting of the active index).
bBlock:        code block to return the value for storing to Get object.
               When performing this code block the selected database is
               cDbfName and RecNo() points to selected record.
lEmpty:        if true the valid data for Get:VarGet is also the result of
               function Empty(Get:VarGet()), otherwise Get:VarGet() must be
               found in the database cDbfName.
aFields:       Array of strings with field_names (column names) of database
               cDbfName, whitch are to be displayed for selection, if invalid
               field value was entered.

Return value:
~~~~~~~~~~~~~
true  if the data value is valid
false if the data value is not valid

Remarks:
~~~~~~~~
This function uses the object of UpBrowse class.

Source code is in file  Object3.prg