SetDateTime ([lNew]) --> lOldValue:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Functions:
~~~~~~~~~~
Serves as a switch, if set to true (if returns true) the ObjectInit()
requires the date and time input, if false then no request.

Parameter description:
~~~~~~~~~~~~~~~~~~~~~~
lNew: new value to set the switch

Return value:
~~~~~~~~~~~~~
true/false

Example:
~~~~~~~~
    ? SetDateTime()        //the value of the switch
    SetDateTime(true)      //set the switch to true
    ? SetDateTime()        //returns true

Source code is in file  Object3.prg