[Zope] Accessing to ZOPE_HOME

Hi all: How can access to the value of the "ZOPE_HOME" that Control_Panel shows in the Zope Management Interface?. My target is read in execution time a content of one external method, but my zope server can run over windows or linux, and i must refer the folder when the zope are installed, indeed when the external methods are located, for example: "/usr/lib/zope2.7/Extensions" or "C:\Program Files\Zope-2.7.4-0\Extensions" I prove with "os.getcwd()" but the value returned is for example:"/var/lib/zope2.7/instance/..." Thank in advance __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/