Novell ZENWORKS APPLICATION VIRTUALIZATION 8.0 - 04-12-2010 User Manual page 38

Novell ZENworks Application Virtualization 39
option.
Exceptions to the child process virtualization behavior specified by the Spawn child process within
virtualized environment and Spawn COM servers within virtualized environment flags can be
enumerated in the child process exception list. Process names listed in the child process exception list behave
opposite to the master child process virtualization setting. To edit the child process exception list, press the Child
Process Exception List button. Process names may or may not include the process filename extension.
Environment variables
Some applications may depend on the presence of certain Windows environment variables in order to function
properly. ZENworks Application Virtualization allows virtualization of environment variables to support such
applications.
To add or modify virtual environment variables, press the Environment Variables... button. This displays the
Environment Variables dialog. Enter environment variable names and values into the environment variable
list.
Most virtual environment variables overwrite any environment variables defined in the host environment.
However, the special PATH and PATHEXT environment variables are always merged with the corresponding
host environment variables.
Environment variables are automatically captured and merged during the snapshotting delta process. Therefore,
it is generally unnecessary to manually configure environment variable settings.
Automatic sandbox reset
The sandbox can optionally be configured to be reset automatically on application shutdown. For example, this
allows an application publisher to assure that any changes made to an application's settings are reverted when the
application closes.
To enable the automatic sandbox reset feature, select the Delete sandbox on application shutdown option.
Read-only virtual environments
In some scenarios, it may be desirable to prevent the user from making any modifications to the virtual
environment, including the virtual filesystem and registry. To block all modifications to the virtual environment,
select the Virtual environment is read-only option.
Startup executable optimization
The startup executable optimization option attempts to launch the startup executable within the initial virtual
machine process. This prevents the creation of a separate application process but may be incompatible with some
applications.
ZAV command-line arguments
ZENworks Application Virtualization supports command-line arguments of the form /x[arg] which modify
virtual application behavior at run-time. In rare instances, these arguments may collide with command-line
arguments designed for use by the virtualized application. To disable processing of these arguments, unselect the
Enable ZAV command-line arguments option.
Window class isolation
Window class isolation prevents the virtualized application from viewing window classes that have been registered
by external processes. For example, this option may be used to prevent interaction between virtualized and non-
virtualized versions of the same application when the application checks for existing class registrations.