InstallShield 2012 Express Edition User Guide - Knowledge Base ...

Table 22-16: Settings for the General Tab on the File Properties Dialog Box (cont.)
Setting Description
Chapter 22: Dialog Box Reference
File Properties Dialog Box
Override system attributes To install this file using the same system properties that are currently set for this file on
the development system, clear this check box.
To override one or more of the file’s properties, select the Override system attributes
check box and then select one or more of the following check boxes.
• Read-only—If you want the file to be read-only when Windows Installer installs it,
select this check box.
• Hidden—If you want the file to be hidden when Windows Installer installs it, select
this check box.
• Use File Hash—This option is applicable for unversioned files only. Windows
Installer can use file hashing to detect and avoid unnecessary copying of
unversioned files. If you want Windows Installer to compare the hash of the file in
your installation with the hash of the corresponding file on the target system when
deciding whether to upgrade an existing file, select this check box.
• System—If you want Windows Installer to install the file as a system file, select this
check box.
• Vital—To indicate that this file is vital to the operation of its component, select this
check box. A vital file’s component is not installed if the file cannot be installed for
any reason. If a vital file cannot be installed, the end user sees an error message
with Retry and Cancel buttons, instead of the usual Abort, Retry, and Ignore buttons
(which enable the end user to complete the installation successfully without
installing that file).
Override system size The Size setting shows the file’s size when the Override system size setting is cleared.
If you want Windows Installer to ignore the actual size of the selected file when it is
calculating the required disk space requirements for your installation, and instead
consider the size to be a value that you specify, select this check box and enter the
appropriate value (in bytes) in the Size setting.
Override system version If the file is a versioned file, the Version setting shows the file’s version when the
Override system version setting is cleared.
If you want Windows Installer to ignore the actual version number of the selected file, and
instead consider the version to be a number that you specify, select this check box and
enter the appropriate version number in the Version setting. At run time, if this file has
the same name and target location as one on the target system, Windows Installer uses
the version number that you specify when it is determining whether to update the target
system’s file with the version in your current installation, or to leave the file as is.
For example, if the file in your project is version 2.0.0.0, and you enter an override
version of 3.0.0.0, Windows Installer may replace the file on the target system if it is
version 3.0.0.1 or later, but not if it is earlier than 3.0.0.0.
For more details about how Windows Installer determines whether to overwrite an
existing file, see Overwriting Files on the Target Machine.
The maximum version number for a file is 65535.65535.65535.65535.
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