Symantec WINDOWS INSTALLER EDITOR 7.0 SP2 - REFERENCE FOR WISE INSTALLATION STUDIO V1.0 Installation Manual page 541

Windows Installer Editor Reference
Note
When you add a custom action to a merge module, you'll notice that the Custom
Action Name field automatically contains the GUID of the merge module. You should
leave the GUID as part of the custom action name to ensure adherence to Windows
Installer guidelines for naming custom actions in merge modules.
Because a merge module is merged into a standard installation, you must specify where
the custom action should be merged into the action sequence of the standard
installation. To specify where this custom action is merged into the main action
sequence, set the following options:
No Sequence
Clear this to add this action to an action sequence. If the action is not in an action
sequence, it is never executed.
If you clear the No Sequence, enter the following information:
Sequence
Select a sequence to which to add this custom action. The options here correspond
to the sequences available with each of the three installation modes of a standard
installation (.WSI or .MSI file).
Reference Action
This drop-down list contains all the standard Windows Installer actions from the
sequence that you selected in the Sequence drop-down list. This custom action,
when merged into a standard installation, will be placed relative to the action you
select in this list.
Sequence Number
If the reference action you select above is not found, this custom action will be
placed using this sequence number. In most cases, you can ignore this field. You can
view sequence numbers for a particular sequence by viewing the sequence in the
Tables tab in Setup Editor.
In the Placement section, mark an option to specify where to place this action:
Before Action
Click this option to place this action before the Reference Action you selected
above.
After Action
Click this option to place this action after the Reference Action you selected
above.
Condition
If you want this action to run only if a certain condition is true, enter a condition. In
the User Interface, Execute Immediate, and Execute Deferred sequences, the
condition you enter is displayed as an If Statement preceding the custom action. To
use the Condition Builder to create a syntactically correct Windows Installer
condition, click Build.
See Creating Conditions With Condition Builder
See also:
All Custom Actions on page 493
Custom Action Reference
on page 441.
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