CONSTANT

VALUE DESCRIPTION

INSTALLTYPE_DEFAULT

0

Searches the system for products to patch. In this case, InstallPackage must be an empty string ("").

INSTALLTYPE_NETWORK_IMAGE

1

Specifies an administrative installation. In this case,

InstallPackage must be set to a package path.

INSTALLTYPE_SINGLE_INSTANCE

2

Patch the product specified by InstallPackage. InstallPackage is the product code of the instance to patch. This type of installation requires the installer be running Windows Server 2003 family or Windows XP SP1. For more information see the MSDN topic, Installing Multiple Instances of Products and Patches.