l when accessed in this way.&nbsp; Improvements in the testing
documentation and the basic specification, and the stated desire from
applications writers has resulted in better programmatic drivers, but that
still leaves another problem.</p>

<p class=MsoNormal>&nbsp;</p>

<p class=MsoNormal>Programmatic interfaces must reflect the abilities of their
drivers.&nbsp; They must constrain possible values as dictated by the device,
and they must prevent illegal combinations of functionality.&nbsp; What this
mean