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Description
The ActivePatch PatchFile control allows
you to create and apply individual patch files on the local system.
Reference
File Name
APATCH.OCX
Object Type
PatchFile
Remarks
The PatchFile control can be used in an application to
create individual patch files, as well as apply those patch files on a local system.
Unlike simple data compression, creating a patch involves analyzing the differences
between two files at the byte level, and generating a set of instructions that will
convert one file into another. Typically, a patch is created to update an older version of
a file with a newer version. Because only the differences between the file are stored in
the patch, the difference in size can be significant, in some cases achieving a 90% or
better compression ratio.
Requirements
The PatchFile control is designed for the 32-bit Windows
platform, and is supported on Windows 95, Windows 98, Windows ME, Windows NT 4.0, Windows
2000 and Windows XP. For Windows 95/98 and Windows ME it is recommended that the system
have at least 16 MB of physical memory. For Windows NT 4.0, it is recommended that the
system have at least 32 MB of physical memory, and have at least Service Pack 5 (SP5)
installed. For Windows 2000, it is recommended that the system have at least 64 MB of
physical memory.
Distribution
When you redistribute your application that uses the
control, it is recommended that you install the control in the Windows system directory.
The ActivePatch control does not have any dependencies on
additional libraries except for standard system libraries which are included with the
operating system.
ActiveX components must be registered during the
installation process or by using a component registration utility. The registration
process writes specific information into the system registry so that an application can
load and use the control. If an application attempts to use an unregistered control, it
will fail to execute and return an error.
Copyright
Copyright 2000-2006, Catalyst
Development Corporation. All rights reserved.
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