Dave,

Here's some test code that demonstrates what David is saying.

ox=CreateObject("MyClass")
?TYPE("ox")
?ISNULL(ox)
ox.release
?TYPE("ox")
?ISNULL(ox)

DEFINE CLASS MyClass AS Label
 PROCEDURE Release
    RELEASE THIS
 ENDPROC
ENDDEFINE

You will notice that the ox variabel still exists after the call to the release, however its value is NULL and the object is gone. It retains the data type for the last value it had, O for Object.