MSI Custom Action Types

This table also shows how you should interpret the Source and Target columns for each type of custom action

Type	Description	Source	Target
1	.dll stored in a binary Stream	Key to a row in the Binary table	Name of the .dll entry point.
2	.exe stored in a binary Stream	Key to a row in the Binary table	Command-line string used to launch the .exe.
5	JScript in a binary Stream	Key to a row in the Binary table	Name of the JScript function to call.
6	VBScript in a binary Stream	Key to a row in the Binary table	Name of the VBScript function to call
7	Installation of a package nested inside of the first package	Name of the substorage containing database of nested application.	Properties settings string.
17	.dll installed as part of a product	Key to a row in the File Table	Name of the .dll entry point.
18	.exe installed as part of a product	Key to a row in the File Table	Command-line string used to launch the .exe.
19	Displays a specified error message and returns failure, terminating the installation	Blank	Formatted text string. The literal message or an index into the Error table.
21	JScript file installed as part of a product	Key to a row in the File Table	Name of the JScript function to call.
22	VBScript file installed as part of a product	Key to a row in the File Table	Name of the VBScript function to call.
23	Installation of a package that resides in the first application’s source tree	Path of nested package specified relative to the root of the source location	Properties settings String
34	EXE in a known Directory	Key to a row in the Directory table	Name of the executable file and any options. Use quotes to surround long file names.
35	Directory set via formatted text	Key to the Directory Table	Formatted text string that will be set as the directory path when this action is executed.
37	JScript text	Null	A string of JScript code to execute.
38	VBScript text	Null	A string of VBScript code to execute.
39	Installation of an application that is advertised or already installed	Product Code for the application to install	Properties settings String
50	.exe named by a Property	Property name or key to a row in the Property table	Command-line string used to launch the .exe.
51	Property set via formatted text	Property name or key to the Property table	Formatted text string that will be stored in the property when this action is executed.
53	JScript text stored in a Property	Property name or key to a row in the Property table	Name of the JScript function to call.
54	VBScript text stored in a property	Property name or key to a row in the Property table	Name of the VBScript function to call.