View source for InstallShield archive (IBT)

{{FormatInfo
|formattype=electronic
|subcat=Archiving
|extensions={{ext|ibt}}
}}
'''InstallShield archive (IBT)''' refers to an archive file format associated with [[InstallShield]]. The filename is usually "setup.ibt".

It contains embedded files compressed in [[MS-DOS installation compression|MS Compress]] "SZDD" format.

The files it contains are usually redistributable InstallShield DLL files. It may be comparable to the [[InstallShield installer archive]] format used by earlier versions of InstallShield.

== Format details ==
An IBT file consists of a sequence of member file segments. Each segment begins with four strings, each terminated by a NUL byte:

# Name of compressed file
# Name of original file
# A version number of some sort
# A number that can be used to locate the next segment

An embedded SZDD-compressed file follows. It begins with the standard SZDD signature bytes: <code>'S' 'Z' 'D' 'D' 0x88 0xf0 0x27 0x33</code>.

== Identification ==
Refer to the ''Format details'' section.

It's possible that, in practice, all such files start with "<code>setup.dl_</code>" <code>0x00</code> "<code>setup.dll</code>" <code>0x00</code>.

== Software ==
* {{Deark}}

== Sample files ==
* [https://archive.org/details/art-attack-my-stuff Art Attack: My Stuff] → setup.ibt
* [https://archive.org/details/imagemixer3seforcanon ImageMixer 3 SE for Canon Camcorders] → setup.ibt
* {{DexvertSamples|archive/installShieldArchive}}

[[Category:File formats with a distinctive filename]]