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D (Windows Installer)

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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

database function

Accesses the installer database. These functions are provided primarily for use by installer package authoring tools and they are not intended to be used to call installer services. For more information, see Database Functions and the Installer Function Reference.

database handle

Required for working with a database. For more information, see Obtaining a Database Handle.

delta patch

A delta patch is a delta-compressed Windows Installer patch created using a tool, such as Patchwiz.dll, that supports delta compression. Patches that use delta compression can reduce the size of an update by providing only the differences (deltas) between existing files on a target computer and the desired new files. The desired new files are then synthesized from the existing files and the downloaded deltas. For more information about delta compression technology, see the Delta Compression Application Programming Interface.