LogOn () --> true/false:
~~~~~~~~~~~~~~~~~~~~~~~~

Functions:
~~~~~~~~~~
Increase of the user counter by one.

Parameter description:
~~~~~~~~~~~~~~~~~~~~~~
nil

Return value:
~~~~~~~~~~~~~
true if increasing of the user counter was done, otherwise false.

Remarks:
~~~~~~~~
Counter is the ViewId field of first record in OBasic1.dbf. After first
starting of the program it is Performed LogOn() automaticaly, after
finishing of program the LogOff(). The LogXXX functions are used for
reindex after first running when a emergency (aborted) finish of the
program was detected. The most interesting use of LogXXX functions
is in Dbf class in method Open(). If you end the program indenpendently
by own quit command, don't forget to perform the LogOff() befor a quit.
More conveenient is to let the program to end it by itself.

Source code is in file  Object3.prg