The functions will return one of the following error values:
E_OK
The function was successful.
E_BAD_ARGUMENT
A bad argument was passed to the function.
E_POSTED
The form is already posted to the screen.
E_NOT_POSTED
The form was not posted to the screen.
E_NOT_CONNECTED
There are no fields associated with the form.
E_BAD_STATE
The function was called from within a init or term function.